1
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Liu X, McPherson JN, Andersen CE, Jørgensen MSB, Larsen RW, Yutronkie NJ, Wilhelm F, Rogalev A, Giménez-Marqués M, Mínguez Espallargas G, Göb CR, Pedersen KS. A zero-valent palladium cluster-organic framework. Nat Commun 2024; 15:1177. [PMID: 38331922 PMCID: PMC10853280 DOI: 10.1038/s41467-024-45363-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 01/19/2024] [Indexed: 02/10/2024] Open
Abstract
Acquiring spatial control of nanoscopic metal clusters is central to their function as efficient multi-electron catalysts. However, dispersing metal clusters on surfaces or in porous hosts is accompanied by an intrinsic heterogeneity that hampers detailed understanding of the chemical structure and its relation to reactivities. Tethering pre-assembled molecular metal clusters into polymeric, crystalline 2D or 3D networks constitutes an unproven approach to realizing ordered arrays of chemically well-defined metal clusters. Herein, we report the facile synthesis of a {Pd3} cluster-based organometallic framework from a molecular triangulo-Pd3(CNXyl)6 (Xyl = xylyl; Pd3) cluster under chemically mild conditions. The formally zero-valent Pd3 cluster readily engages in a complete ligand exchange when exposed to a similar, ditopic isocyanide ligand, resulting in polymerization into a 2D coordination network (Pd3-MOF). The structure of Pd3-MOF could be unambiguously determined by continuous rotation 3D electron diffraction (3D-ED) experiments to a resolution of ~1.0 Å (>99% completeness), showcasing the applicability of 3D-ED to nanocrystalline, organometallic polymers. Pd3-MOF displays Pd03 cluster nodes, which possess significant thermal and aerobic stability, and activity towards hydrogenation catalysis. Importantly, the realization of Pd3-MOF paves the way for the exploitation of metal clusters as building blocks for rigidly interlocked metal nanoparticles at the molecular limit.
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Affiliation(s)
- Xiyue Liu
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs, Lyngby, Denmark
| | - James N McPherson
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs, Lyngby, Denmark.
| | - Carl Emil Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs, Lyngby, Denmark
| | - Mike S B Jørgensen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs, Lyngby, Denmark
| | - René Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs, Lyngby, Denmark
| | - Nathan J Yutronkie
- European Synchrotron Radiation Facility (ESRF), CS 40220, 38043, Grenoble Cedex 9, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF), CS 40220, 38043, Grenoble Cedex 9, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), CS 40220, 38043, Grenoble Cedex 9, France
| | - Mónica Giménez-Marqués
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, 46980, Valencia, Spain
| | | | - Christian R Göb
- Rigaku Europe SE, Hugenottenallee 167, 63263, Neu-Isenburg, Germany
| | - Kasper S Pedersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs, Lyngby, Denmark.
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2
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Aslandukov A, Jurzick PL, Bykov M, Aslandukova A, Chanyshev A, Laniel D, Yin Y, Akbar FI, Khandarkhaeva S, Fedotenko T, Glazyrin K, Chariton S, Prakapenka V, Wilhelm F, Rogalev A, Comboni D, Hanfland M, Dubrovinskaia N, Dubrovinsky L. Stabilization Of The CN 3 5- Anion In Recoverable High-pressure Ln 3 O 2 (CN 3 ) (Ln=La, Eu, Gd, Tb, Ho, Yb) Oxoguanidinates. Angew Chem Int Ed Engl 2023; 62:e202311516. [PMID: 37768278 DOI: 10.1002/anie.202311516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 09/29/2023]
Abstract
A series of isostructural Ln3 O2 (CN3 ) (Ln=La, Eu, Gd, Tb, Ho, Yb) oxoguanidinates was synthesized under high-pressure (25-54 GPa) high-temperature (2000-3000 K) conditions in laser-heated diamond anvil cells. The crystal structure of this novel class of compounds was determined via synchrotron single-crystal X-ray diffraction (SCXRD) as well as corroborated by X-ray absorption near edge structure (XANES) measurements and density functional theory (DFT) calculations. The Ln3 O2 (CN3 ) solids are composed of the hitherto unknown CN3 5- guanidinate anion-deprotonated guanidine. Changes in unit cell volumes and compressibility of Ln3 O2 (CN3 ) (Ln=La, Eu, Gd, Tb, Ho, Yb) compounds are found to be dictated by the lanthanide contraction phenomenon. Decompression experiments show that Ln3 O2 (CN3 ) compounds are recoverable to ambient conditions. The stabilization of the CN3 5- guanidinate anion at ambient conditions provides new opportunities in inorganic and organic synthetic chemistry.
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Affiliation(s)
- Andrey Aslandukov
- Bayerisches Geoinstitut, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
| | - Pascal L Jurzick
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939, Cologne, Germany
| | - Maxim Bykov
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939, Cologne, Germany
| | - Alena Aslandukova
- Bayerisches Geoinstitut, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
| | - Artem Chanyshev
- Bayerisches Geoinstitut, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
| | - Dominique Laniel
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, EH9 3FD, Edinburgh, United Kingdom
| | - Yuqing Yin
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
| | - Fariia I Akbar
- Bayerisches Geoinstitut, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
| | - Saiana Khandarkhaeva
- Bayerisches Geoinstitut, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
| | - Timofey Fedotenko
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607, Hamburg, Germany
| | - Konstantin Glazyrin
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607, Hamburg, Germany
| | - Stella Chariton
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois, 60637, USA
| | - Vitali Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois, 60637, USA
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility BP 220, 38043, Grenoble Cedex, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility BP 220, 38043, Grenoble Cedex, France
| | - Davide Comboni
- European Synchrotron Radiation Facility BP 220, 38043, Grenoble Cedex, France
| | - Michael Hanfland
- European Synchrotron Radiation Facility BP 220, 38043, Grenoble Cedex, France
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83, Linköping, Sweden
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, University of Bayreuth, Universitätstrasse 30, 95440, Bayreuth, Germany
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3
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Chen H, Manvell AS, Kubus M, Dunstan MA, Lorusso G, Gracia D, Jørgensen MSB, Kegnæs S, Wilhelm F, Rogalev A, Evangelisti M, Pedersen KS. Towards frustration in Eu(II) Archimedean tessellations. Chem Commun (Camb) 2023; 59:1609-1612. [PMID: 36692932 DOI: 10.1039/d2cc06224k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Self-assembly of trans-{EuI2} nodes and ditopic ligands leads to isoreticular 2D frameworks featuring a rare, non-kagome Archimedean tessellation. The topology and intra-layer Eu(II)-Eu(II) antiferromagnetic interactions provide the prerequisites for geometrical spin frustration, which, due to the spin state degeneracy, is key for novel phenomena such as enhanced magnetic refrigeration.
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Affiliation(s)
- Hua Chen
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | - Anna S Manvell
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | - Mariusz Kubus
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | - Maja A Dunstan
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | - Giulia Lorusso
- CNR-Institute for Microelectronics and Microsystems, Bologna Unit, Bologna 40129, Italy
| | - David Gracia
- Instituto de Nanociencia y Materiales de Aragón, Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Mike S B Jørgensen
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | - Søren Kegnæs
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility, BP 220, Grenoble Cedex 9 38043, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility, BP 220, Grenoble Cedex 9 38043, France
| | - Marco Evangelisti
- Instituto de Nanociencia y Materiales de Aragón, Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Kasper S Pedersen
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
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4
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Wang X, Liu Z, Deng H, Agrestini S, Chen K, Lee JF, Lin HJ, Chen CT, Choueikani F, Ohresser P, Wilhelm F, Rogalev A, Tjeng LH, Hu Z, Long Y. Comparative Study on the Magnetic and Transport Properties of B-Site Ordered and Disordered CaCu 3Fe 2Os 2O 12. Inorg Chem 2022; 61:16929-16935. [PMID: 36214839 PMCID: PMC9597663 DOI: 10.1021/acs.inorgchem.2c03030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The B-site Fe/Os ordered and disordered quadruple perovskite oxides CaCu3Fe2Os2O12 were synthesized under different high-pressure and high-temperature conditions. The B-site ordered CaCu3Fe2Os2O12 is a system with a very high ferrimagnetic ordering temperature of 580 K having the Cu2+(↑)Fe3+(↑)Os5+(↓) charge and spin arrangement. In comparison, the highly disordered CaCu3Fe2Os2O12 has a reduced magnetic transition temperature of about 350 K. The Cu2+Fe3+Os5+ charge combination remains the same without any sign of changes in the valence state of the constituent ions. Although the average net moments of each sublattice are reduced, the average ferrimagnetic spin arrangement is unaltered. The robustness of the basic magnetic properties of CaCu3Fe2Os2O12 against site disorder may be taken as an indication of the tendency to maintain the short-range order of the atomic constituents.
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Affiliation(s)
- Xiao Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
| | - Zhehong Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongshan Deng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Stefano Agrestini
- Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany.,ALBA Synchrotron Light Source, Cerdanyola del Vall'es, Barcelona E-08290, Spain
| | - Kai Chen
- Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
| | - Jyh-Fu Lee
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Hong-Ji Lin
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Chien-Te Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Fadi Choueikani
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette Cedex 91192, France
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette Cedex 91192, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble 38043, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble 38043, France
| | - Liu Hao Tjeng
- Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
| | - Youwen Long
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.,Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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5
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Atzori M, Cortijo M, Hillard E, Rikken G, Rogalev A, Rosa P, Sainctavit P, Train C, Wilhelm F. Chirality determination in single crystals using XNCD and MChD. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322090611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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6
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Rubín J, Arauzo A, Bartolomé E, Sedona F, Rancan M, Armelao L, Luzón J, Guidi T, Garlatti E, Wilhelm F, Rogalev A, Amann A, Spagna S, Bartolomé J, Bartolomé F. Origin of the Unusual Ground-State Spin S = 9 in a Cr 10 Single-Molecule Magnet. J Am Chem Soc 2022; 144:12520-12535. [PMID: 35759747 PMCID: PMC9979690 DOI: 10.1021/jacs.2c05453] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The molecular wheel [Cr10(OMe)20(O2CCMe3)10], abbreviated {Cr10}, with an unusual intermediate total spin S = 9 and non-negligible cluster anisotropy, D/kB = -0.045(2) K, is a rare case among wheels based on an even number of 3d-metals, which usually present an antiferromagnetic (AF) ground state (S = 0). Herein, we unveil the origin of such a behavior. Angular magnetometry measurements performed on a single crystal confirmed the axial anisotropic behavior of {Cr10}. For powder samples, the temperature dependence of the susceptibility plotted as χT(T) showed an overall ferromagnetic (FM) behavior down to 1.8 K, whereas the magnetization curve M(H) did not saturate at the expected 30 μB/fu for 10 FM coupled 3/2 spin Cr3+ ions, but to a much lower value, corresponding to S = 9. In addition, the X-ray magnetic circular dichroism (XMCD) measured at high magnetic field (170 kOe) and 7.5 K showed the polarization of the cluster moment up to 23 μB/fu. The magnetic results can be rationalized within a model, including the cluster anisotropy, in which the {Cr10} wheel is formed by two semiwheels, each with four Cr3+ spins FM coupled (JFM/kB = 2.0 K), separated by two Cr3+ ions AF coupled asymmetrically (J23/kB = J78/kB = -2.0 K; J34/kB = J89/kB = -0.25 K). Inelastic neutron scattering and heat capacity allowed us to confirm this model leading to the S = 9 ground state and first excited S = 8. Single-molecule magnet behavior with an activation energy of U/kB = 4.0(5) K in the absence of applied field was observed through ac susceptibility measurements down to 0.1 K. The intriguing magnetic behavior of {Cr10} arises from the detailed asymmetry in the molecule interactions produced by small-angle distortions in the angles of the Cr-O-Cr alkoxy bridges coupling the Cr3+ ions, as demonstrated by ab initio and density functional theory calculations, while the cluster anisotropy can be correlated to the single-ion anisotropies calculated for each Cr3+ ion in the wheel.
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Affiliation(s)
- Javier Rubín
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain,Departamento
de Ciencia y Tecnología de Materiales y Fluidos, Universidad de Zaragoza, 50018 Zaragoza, Spain,
| | - Ana Arauzo
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain,Servicio
de Medidas Físicas, Universidad de
Zaragoza, Pedro Cerbuna
12, 50009 Zaragoza, Spain,Departamento
de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Elena Bartolomé
- Escola
Universitària Salesiana de Sarrià (EUSS), Passeig Sant Joan Bosco 74, 08017 Barcelona, Spain,
| | - Francesco Sedona
- Dipartimento
di Scienze Chimiche, Università di
Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Marzio Rancan
- Institute
of Condensed Matter Chemistry and Technologies for Energy (ICMATE),
National Research Council (CNR), c/o Department of Chemistry, University of Padova, via F. Marzolo 1, 35131 Padova, Italy
| | - Lidia Armelao
- Dipartimento
di Scienze Chimiche, Università di
Padova, Via Marzolo 1, 35131 Padova, Italy,Department
of Chemical Sciences and Materials Technologies (DSCTM), National Research Council (CNR), Piazzale A. Moro 7, 00185 Roma, Italy
| | - Javier Luzón
- Academia
General Militar, Centro Universitario de
la Defensa, 50090 Zaragoza, Spain
| | - Tatiana Guidi
- Physics
Division, School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, MC, Italy,ISIS
Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, Oxfordshire, U.K.
| | - Elena Garlatti
- Dipartimento
di Science Matematiche, Fisiche e Informatiche, Università di Parma, Parco Area delle Scienze 7/A, 43124 Parma, Italy
| | - Fabrice Wilhelm
- ESRF − The European Synchrotron Radiation Facility, 71 Avenue des Martyrs CS40220, F-38043 Grenoble Cedex 09, France
| | - Andrei Rogalev
- ESRF − The European Synchrotron Radiation Facility, 71 Avenue des Martyrs CS40220, F-38043 Grenoble Cedex 09, France
| | - Andreas Amann
- Quantum Design Inc., San Diego, California 92121, United States
| | - Stefano Spagna
- Quantum Design Inc., San Diego, California 92121, United States
| | - Juan Bartolomé
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain,Departamento
de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Fernando Bartolomé
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain,Departamento
de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain,
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7
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Samardak AS, Ognev AV, Kolesnikov AG, Stebliy ME, Samardak VY, Iliushin IG, Pervishko AA, Yudin D, Platunov M, Ono T, Wilhelm F, Rogalev A. XMCD and ab initio study of interface-engineered ultrathin Ru/Co/W/Ru films with perpendicular magnetic anisotropy and strong Dzyaloshinskii-Moriya interaction. Phys Chem Chem Phys 2022; 24:8225-8232. [PMID: 35319030 DOI: 10.1039/d1cp05456b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the nature of recently discovered spin-orbital induced phenomena and a definition of a general approach for "ferromagnet/heavy-metal" layered systems to enhance and manipulate spin-orbit coupling, spin-orbit torque, and the Dzyaloshinskii-Moriya interaction (DMI) assisted by atomic-scale interface engineering are essential for developing spintronics and spin-orbitronics. Here, we exploit X-ray magnetic circular dichroism (XMCD) spectroscopy at the L2,3-edges of 5d and 4d non-magnetic heavy metals (W and Ru, respectively) in ultrathin Ru/Co/W/Ru films to determine their induced magnetic moments due to the proximity to the ferromagnetic layer of Co. The deduced orbital and spin magnetic moments agree well with the theoretically predicted values, highlighting the drastic effect of constituting layers on the system's magnetic properties and the strong interfacial DMI in Ru/Co/W/Ru films. As a result, we demonstrate the ability to simultaneously control the strength of magnetic anisotropy and intermixing-enhanced DMI through the interface engineered inversion asymmetry in thin-film chiral ferromagnets, which are a potential host for stable magnetic skyrmions.
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Affiliation(s)
- Alexander S Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Alexey V Ognev
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Alexander G Kolesnikov
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Maksim E Stebliy
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Vadim Yu Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | - Ilia G Iliushin
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia.
| | | | - Dmitry Yudin
- Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Mikhail Platunov
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia.,Synchrotron radiation facility SKIF, Boreskov Institute of Catalysis SB RAS, 630559 Kol'tsovo, Russia.
| | - Teruo Ono
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Russia. .,Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron, 38043 Grenoble Cedex 9, France
| | - Andrey Rogalev
- ESRF-The European Synchrotron, 38043 Grenoble Cedex 9, France
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8
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Mathonière C, Mitcov D, Koumousi E, Amorin Rosario D, Dechambenoit P, Sadaf JF, Sainctavit P, Cartier dit Moulin C, Trzop E, Toupet L, Collet E, Arrio MA, Rogalev A, Wilhelm F, Clerac R. Metal-to-metal electron transfer in a cyanido-bridged {Fe2Co2} square complex followed by X-ray diffraction and absorption techniques. Chem Commun (Camb) 2022; 58:12098-12101. [DOI: 10.1039/d2cc04246k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The switching properties of a cyanido-bridged {Fe2Co2} square molecule were investigated by single-crystal X-ray diffraction and X-ray absorption spectroscopy at both Fe and Co K-edges. Combining these two techniques, a...
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9
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Ovsyannikov SV, Tsirlin AA, Korobeynikov IV, Morozova NV, Aslandukova AA, Steinle-Neumann G, Chariton S, Khandarkhaeva S, Glazyrin K, Wilhelm F, Rogalev A, Dubrovinsky L. Synthesis of Ilmenite-type ε-Mn 2O 3 and Its Properties. Inorg Chem 2021; 60:13348-13358. [PMID: 34415155 DOI: 10.1021/acs.inorgchem.1c01666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In contrast to the corundum-type A2X3 structure, which has only one crystallographic site available for trivalent cations (e.g., in hematite), the closely related ABX3 ilmenite-type structure comprises two different octahedrally coordinated positions that are usually filled with differently charged ions (e.g., in Fe2+Ti4+O3 ilmenite). Here, we report a synthesis of the first binary ilmenite-type compound fabricated from a simple transition-metal oxide (Mn2O3) at high-pressure high-temperature (HP-HT) conditions. We experimentally established that, at normal conditions, the ilmenite-type Mn2+Mn4+O3 (ε-Mn2O3) is an n-type semiconductor with an indirect narrow band gap of Eg = 0.55 eV. Comparative investigations of the electronic properties of ε-Mn2O3 and previously discovered quadruple perovskite ζ-Mn2O3 phase were performed using X-ray absorption near edge spectroscopy. Magnetic susceptibility measurements reveal an antiferromagnetic ordering in ε-Mn2O3 below 210 K. The synthesis of ε-Mn2O3 indicates that HP-HT conditions can induce a charge disproportionation in simple transition-metal oxides A2O3, and potentially various mixed-valence polymorphs of these oxides, for example, with ilmenite-type, LiNbO3-type, perovskite-type, and other structures, could be stabilized at HP-HT conditions.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany.,Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences, 91 Pervomayskaya Str., 620219 Yekaterinburg, Russia
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
| | - Igor V Korobeynikov
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., 620137 Yekaterinburg, Russia
| | - Natalia V Morozova
- M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., 620137 Yekaterinburg, Russia
| | - Alena A Aslandukova
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Gerd Steinle-Neumann
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Stella Chariton
- The University of Chicago, Center for Advanced Radiation Sources, 60637 Chicago, Illinois, United States
| | - Saiana Khandarkhaeva
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, Universität Bayreuth, 95440 Bayreuth, Germany
| | - Konstantin Glazyrin
- Photon Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility, 71, avenue des Martyrs CS 40220, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility, 71, avenue des Martyrs CS 40220, 38043 Grenoble Cedex 9, France
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
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10
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Ovchinnikova EN, Rogalev A, Wilhelm F, de Bergevin F, Dmitrienko VE, Oreshko AP, Kozlovskaya KA, Bakonin RD. Helicity-dependent resonant X-ray scattering in CuB 2O 4. J Synchrotron Radiat 2021; 28:1455-1465. [PMID: 34475293 DOI: 10.1107/s1600577521005853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/06/2021] [Indexed: 06/13/2023]
Abstract
Exploitation of X-ray circular polarized beams to study forbidden Bragg reflections and new information that could be obtained in these experiments are discussed. It is shown that the intensities of such reflections can be different for the right- and left-circular polarizations (i.e. exhibiting circular dichroism) even for the dipole-dipole resonant transitions involved in the scattering process. This difference can be observed only in crystals having no center of inversion. Here, this approach is used to study helicity-dependent resonant diffraction in copper metaborate CuB2O4 single crystal, which is non-centrosymmetric but achiral. Nonetheless, a strong circular dichroism has been observed for hh0 forbidden reflections in the vicinity of the Cu K-edge. This effect is shown to originate from dipolar transitions in Cu atoms occupying the 8(d) Wyckoff position only.
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Affiliation(s)
- E N Ovchinnikova
- Physics Department, Moscow State University, Moscow 119899, Russia
| | - A Rogalev
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - F Wilhelm
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - F de Bergevin
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - V E Dmitrienko
- A. V. Shubnikov Institute of Crystallography, FSRC Crystallography and Photonics RAS, Moscow 119333, Russia
| | - A P Oreshko
- Physics Department, Moscow State University, Moscow 119899, Russia
| | - K A Kozlovskaya
- Physics Department, Moscow State University, Moscow 119899, Russia
| | - R D Bakonin
- Physics Department, Moscow State University, Moscow 119899, Russia
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11
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Perlepe P, Oyarzabal I, Mailman A, Yquel M, Platunov M, Dovgaliuk I, Rouzières M, Négrier P, Mondieig D, Suturina EA, Dourges MA, Bonhommeau S, Musgrave RA, Pedersen KS, Chernyshov D, Wilhelm F, Rogalev A, Mathonière C, Clérac R. Metal-organic magnets with large coercivity and ordering temperatures up to 242°C. Science 2020; 370:587-592. [DOI: 10.1126/science.abb3861] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 09/11/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Panagiota Perlepe
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
- Université de Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Itziar Oyarzabal
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
- Chemistry Faculty, University of the Basque Country, UPV/EHU, 20018 Donostia-San Sebastián, Spain
| | - Aaron Mailman
- Department of Chemistry, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Morgane Yquel
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
- Université de Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Mikhail Platunov
- ESRF-The European Synchrotron, CS 40220, F-38043 Grenoble Cedex 9, France
| | - Iurii Dovgaliuk
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, F-38000 Grenoble, France
| | - Mathieu Rouzières
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
| | - Philippe Négrier
- Université de Bordeaux, CNRS, Laboratoire Ondes et Matière d’Aquitaine, UMR 5798, F-33400 Talence, France
| | - Denise Mondieig
- Université de Bordeaux, CNRS, Laboratoire Ondes et Matière d’Aquitaine, UMR 5798, F-33400 Talence, France
| | | | - Marie-Anne Dourges
- Université de Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33400 Talence, France
| | - Sébastien Bonhommeau
- Université de Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33400 Talence, France
| | - Rebecca A. Musgrave
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
| | - Kasper S. Pedersen
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Dmitry Chernyshov
- Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, F-38000 Grenoble, France
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron, CS 40220, F-38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- ESRF-The European Synchrotron, CS 40220, F-38043 Grenoble Cedex 9, France
| | - Corine Mathonière
- Université de Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Rodolphe Clérac
- Université de Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, F-33600 Pessac, France
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12
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Cortijo M, Valentín-Pérez Á, Rogalev A, Wilhelm F, Sainctavit P, Rosa P, Hillard EA. Rapid Discrimination of Crystal Handedness by X-ray Natural Circular Dichroism (XNCD) Mapping. Chemistry 2020; 26:13363-13366. [PMID: 32598047 DOI: 10.1002/chem.202001783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/04/2020] [Indexed: 11/10/2022]
Abstract
An original method for determining the handedness of individual non-centrosymmetric crystals in a mixture using a tightly-focused, circularly polarized X-ray beam is presented. The X-ray natural circular dichroism (XNCD) spectra recorded at the metal K-edge on selected crystals of [Δ-M(en)3 ](NO3 )2 and [Λ-M(en)3 ](NO3 )2 (M=CoII , NiII ) show extrema at the metal pre-edge (7712 eV for Co, 8335 eV for Ni). A mapping of a collection of some 220 crystals was performed at the respective energies by using left and right circular polarizations. The difference in absorption for the two polarizations, being either negative or positive, directly yielded the handedness of the crystal volume probed by the beam. By using this technique, it was found that the addition of l-ascorbic acid during the synthesis of [Co(en)3 ](NO3 )2 resulted in an enantiomeric enrichment of the Λ-isomer of 67±13 %, whereas the Ni analogue was similarly, but conversely, enriched in the Δ-isomer (65±22 %).
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Affiliation(s)
- Miguel Cortijo
- CNRS, ICMCB, UMR 5026, 33600, Pessac, France.,Université de Bordeaux, ICMCB, UMR 5026, 33600, Pessac, France.,CNRS, CRPP, UMR 5031, 33600, Pessac, France.,Université de Bordeaux, CRPP, UMR 5031, 33600, Pessac, France
| | - Ángela Valentín-Pérez
- CNRS, ICMCB, UMR 5026, 33600, Pessac, France.,Université de Bordeaux, ICMCB, UMR 5026, 33600, Pessac, France.,CNRS, CRPP, UMR 5031, 33600, Pessac, France.,Université de Bordeaux, CRPP, UMR 5031, 33600, Pessac, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), 38043, Grenoble, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF), 38043, Grenoble, France
| | - Philippe Sainctavit
- IMPMC, CNRS, Sorbonne Université, Muséum National d'Histoire Naturelle, UMR7590, 4 place Jussieu, 75252, Paris Cedex 05, France
| | - Patrick Rosa
- CNRS, ICMCB, UMR 5026, 33600, Pessac, France.,Université de Bordeaux, ICMCB, UMR 5026, 33600, Pessac, France
| | - Elizabeth A Hillard
- CNRS, CRPP, UMR 5031, 33600, Pessac, France.,Université de Bordeaux, CRPP, UMR 5031, 33600, Pessac, France
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13
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Mitcov D, Platunov M, Buch CD, Reinholdt A, Døssing AR, Wilhelm F, Rogalev A, Piligkos S. Hard X-ray magnetochiral dichroism in a paramagnetic molecular 4f complex. Chem Sci 2020; 11:8306-8311. [PMID: 34123095 PMCID: PMC8163319 DOI: 10.1039/d0sc02709j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Magnetochiral dichroism (MΧD) originates in the coupling of local electric fields and magnetic moments in systems where a simultaneous break of space parity and time-reversal symmetries occurs. This magnetoelectric coupling, displayed by chiral magnetic materials, can be exploited to manipulate the magnetic moment of molecular materials at the single molecule level. We demonstrate herein the first experimental observation of X-ray magnetochiral dichroism in enantiopure chiral trigonal single crystals of a chiral mononuclear paramagnetic lanthanide coordination complex, namely, holmium oxydiacetate, at the Ho L3-edge. The observed magnetochiral effect is opposite for the two enantiomers and is rationalised on the basis of a multipolar expansion of the matter–radiation interaction. These results demonstrate that 4f–5d hybridization in chiral lanthanoid coordination complexes is at the origin of magnetochiral dichroism, an effect that could be exploited for addressing of their magnetic moment at the single molecule level. Magnetochiral Dichroism of chiral mononuclear lanthanoid complexes is for the first time detected by X-ray absorption measurements on single crystals of Holmium oxydiacetate, at the Ho L3-edge. The effect is of opposite sign for the two enantiomers.![]()
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Affiliation(s)
- Dmitri Mitcov
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Mikhail Platunov
- ESRF - The European Synchrotron CS 40220 38043 Grenoble Cedex 9 France
| | - Christian D Buch
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Anders Reinholdt
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Anders R Døssing
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Fabrice Wilhelm
- ESRF - The European Synchrotron CS 40220 38043 Grenoble Cedex 9 France
| | - Andrei Rogalev
- ESRF - The European Synchrotron CS 40220 38043 Grenoble Cedex 9 France
| | - Stergios Piligkos
- Department of Chemistry, University of Copenhagen Universitetsparken 5 DK-2100 Copenhagen Denmark
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14
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Ma X, Suturina EA, Rouzières M, Wilhelm F, Rogalev A, Clérac R, Dechambenoit P. A heteroleptic diradical Cr(iii) complex with extended spin delocalization and large intramolecular magnetic exchange. Chem Commun (Camb) 2020; 56:4906-4909. [PMID: 32239004 DOI: 10.1039/d0cc00548g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Successive chemical reductions of the heteroleptic complex [(tpy)CrIII(tphz)]3+ (tpy = terpyridine; tphz = tetrapyridophenazine) give rise to the mono- and di-radical redox isomers, [(tpy)CrIII(tphz˙-)]2+ and [(tpy˙-)CrIII(tphz˙-)]+, respectively. As designed, the optimized overlap of the involved magnetic orbitals leads to extremely strong magnetic interactions between the S = 3/2 metal ion and S = 1/2 radical spins, affording well isolated ST = 1 and ST = 1/2 ground states at room temperature.
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Affiliation(s)
- Xiaozhou Ma
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, 33600 Pessac, France.
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15
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Liu J, Pedersen KS, Greer SM, Oyarzabal I, Mondal A, Hill S, Wilhelm F, Rogalev A, Tressaud A, Durand E, Long JR, Clérac R. Access to Heteroleptic Fluorido‐Cyanido Complexes with a Large Magnetic Anisotropy by Fluoride Abstraction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jun‐Liang Liu
- Univ. Bordeaux CNRS Centre de Recherche Paul Pascal CRPP UMR 5031 33600 Pessac France
- Current address: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Kasper S. Pedersen
- Univ. Bordeaux CNRS Centre de Recherche Paul Pascal CRPP UMR 5031 33600 Pessac France
- Current address: Department of Chemistry Technical University of Denmark 2800, Kgs. Lyngby Denmark
| | - Samuel M. Greer
- Department of Chemistry Florida State University
- National High Magnetic Field Laboratory Florida State University Tallahassee FL 32306 USA
| | - Itziar Oyarzabal
- Univ. Bordeaux CNRS Centre de Recherche Paul Pascal CRPP UMR 5031 33600 Pessac France
- Chemistry Faculty University of the Basque Country UPV/EHU 20018 Donostia-San Sebastián Spain
| | - Abhishake Mondal
- Univ. Bordeaux CNRS Centre de Recherche Paul Pascal CRPP UMR 5031 33600 Pessac France
- Current address: Solid State and Structural Chemistry Unit Indian Institute of Science C.V. Raman Road Bangalore 560012 India
| | - Stephen Hill
- Department of Physics Florida State University
- National High Magnetic Field Laboratory Florida State University Tallahassee FL 32306 USA
| | | | - Andrei Rogalev
- ESRF-The European Synchrotron 38043 Grenoble Cedex 9 France
| | | | | | - Jeffrey R. Long
- Department of Chemistry University of California Berkeley USA
- Department of Chemical and Biomolecular Engineering University of California Berkeley USA
- Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Rodolphe Clérac
- Univ. Bordeaux CNRS Centre de Recherche Paul Pascal CRPP UMR 5031 33600 Pessac France
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16
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Liu JL, Pedersen KS, Greer SM, Oyarzabal I, Mondal A, Hill S, Wilhelm F, Rogalev A, Tressaud A, Durand E, Long JR, Clérac R. Access to Heteroleptic Fluorido-Cyanido Complexes with a Large Magnetic Anisotropy by Fluoride Abstraction. Angew Chem Int Ed Engl 2020; 59:10306-10310. [PMID: 32080955 DOI: 10.1002/anie.201914934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Indexed: 11/07/2022]
Abstract
Silicon-mediated fluoride abstraction is demonstrated as a means of generating the first fluorido-cyanido transition metal complexes. This new synthetic approach is exemplified by the synthesis and characterization of the heteroleptic complexes, trans-[MIV F4 (CN)2 ]2- (M=Re, Os), obtained from their homoleptic [MIV F6 ]2- parents. As shown by combined high-field electron paramagnetic resonance spectroscopy and magnetization measurements, the partial substitution of fluoride by cyanide ligands leads to a marked increase in the magnetic anisotropy of trans-[ReF4 (CN)2 ]2- as compared to [ReF6 ]2- , reflecting the severe departure from an ideal octahedral (Oh point group) ligand field. This methodology paves the way toward the realization of new heteroleptic transition metal complexes that may be used as highly anisotropic building-blocks for the design of high-performance molecule-based magnetic materials.
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Affiliation(s)
- Jun-Liang Liu
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, CRPP, UMR 5031, 33600, Pessac, France.,Current address: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Kasper S Pedersen
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, CRPP, UMR 5031, 33600, Pessac, France.,Current address: Department of Chemistry, Technical University of Denmark, 2800, Kgs., Lyngby, Denmark
| | - Samuel M Greer
- Department of Chemistry, Florida State University.,National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32306, USA
| | - Itziar Oyarzabal
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, CRPP, UMR 5031, 33600, Pessac, France.,Chemistry Faculty, University of the Basque Country UPV/EHU, 20018, Donostia-San Sebastián, Spain
| | - Abhishake Mondal
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, CRPP, UMR 5031, 33600, Pessac, France.,Current address: Solid State and Structural Chemistry Unit, Indian Institute of Science, C.V. Raman Road, Bangalore, 560012, India
| | - Stephen Hill
- Department of Physics, Florida State University.,National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32306, USA
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron, 38043, Grenoble Cedex 9, France
| | - Andrei Rogalev
- ESRF-The European Synchrotron, 38043, Grenoble Cedex 9, France
| | - Alain Tressaud
- CNRS, ICMCB, UPR 9048, Univ. Bordeaux, 33608, Pessac, France
| | - Etienne Durand
- CNRS, ICMCB, UPR 9048, Univ. Bordeaux, 33608, Pessac, France
| | - Jeffrey R Long
- Department of Chemistry, University of California Berkeley, USA.,Department of Chemical and Biomolecular Engineering, University of California Berkeley, USA.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Rodolphe Clérac
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, CRPP, UMR 5031, 33600, Pessac, France
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17
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Elnaggar H, Sainctavit P, Juhin A, Lafuerza S, Wilhelm F, Rogalev A, Arrio MA, Brouder C, van der Linden M, Kakol Z, Sikora M, Haverkort MW, Glatzel P, de Groot FMF. Noncollinear Ordering of the Orbital Magnetic Moments in Magnetite. Phys Rev Lett 2019; 123:207201. [PMID: 31809079 DOI: 10.1103/physrevlett.123.207201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 10/02/2019] [Indexed: 05/22/2023]
Abstract
The magnitude of the orbital magnetic moment and its role as a trigger of the Verwey transition in the prototypical Mott insulator, magnetite, remain contentious. Using 1s2p resonant inelastic x-ray scattering angle distribution (RIXS-AD), we prove the existence of noncollinear orbital magnetic ordering and infer the presence of dynamical distortion creating a polaronic precursor for the metal to insulator transition. These conclusions are based on a subtle angular shift of the RIXS-AD spectral intensity as a function of the magnetic field orientation. Theoretical simulations show that these results are only consistent with noncollinear magnetic orbital ordering. To further support these claims we perform Fe K-edge x-ray magnetic circular dichroism in order to quantify the Fe average orbital magnetic moment.
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Affiliation(s)
- H Elnaggar
- Debye Institute for Nanomaterials Science, Utrecht University, 3584 CA Utrecht, The Netherlands
| | - Ph Sainctavit
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Sorbonne Université, MNHN, UMR7590, 75252 Paris Cedex 05, France
| | - A Juhin
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Sorbonne Université, MNHN, UMR7590, 75252 Paris Cedex 05, France
| | - S Lafuerza
- European Synchrotron Radiation Facility, CS40220, F-38043 Grenoble Cedex 9, France
| | - F Wilhelm
- European Synchrotron Radiation Facility, CS40220, F-38043 Grenoble Cedex 9, France
| | - A Rogalev
- European Synchrotron Radiation Facility, CS40220, F-38043 Grenoble Cedex 9, France
| | - M-A Arrio
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Sorbonne Université, MNHN, UMR7590, 75252 Paris Cedex 05, France
| | - Ch Brouder
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Sorbonne Université, MNHN, UMR7590, 75252 Paris Cedex 05, France
| | - M van der Linden
- Debye Institute for Nanomaterials Science, Utrecht University, 3584 CA Utrecht, The Netherlands
- European Synchrotron Radiation Facility, CS40220, F-38043 Grenoble Cedex 9, France
| | - Z Kakol
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
| | - M Sikora
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
| | - M W Haverkort
- Institut für Theoritiche Physik, Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany
| | - P Glatzel
- European Synchrotron Radiation Facility, CS40220, F-38043 Grenoble Cedex 9, France
| | - F M F de Groot
- Debye Institute for Nanomaterials Science, Utrecht University, 3584 CA Utrecht, The Netherlands
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18
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Pedersen KS, Meihaus KR, Rogalev A, Wilhelm F, Aravena D, Amoza M, Ruiz E, Long JR, Bendix J, Clérac R. [UF
6
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2−
: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kasper S. Pedersen
- Univ. Bordeaux, CNRS Centre de Recherche Paul Pascal, UMR 5031 33600 Pessac France
- Department of Chemistry Technical University of Denmark, 2800 Kgs. Lyngby Denmark
| | - Katie R. Meihaus
- Department of Chemistry University of California Berkeley CA 94720 USA
| | - Andrei Rogalev
- ESRF–The European Synchrotron, 71, Avenue des Martyrs 38000 Grenoble Cedex 9 France
| | - Fabrice Wilhelm
- ESRF–The European Synchrotron, 71, Avenue des Martyrs 38000 Grenoble Cedex 9 France
| | - Daniel Aravena
- Departamento de Química de los Materiales Facultad de Química y Biología Universidad de Santiago de Chile (USACH) Casilla 40, Correo 33 Santiago Chile
| | - Martín Amoza
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Jeffrey R. Long
- Department of Chemistry University of California Berkeley CA 94720 USA
- Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Chemical and Biomolecular Engineering University of California Berkeley Berkeley CA 94720 USA
| | - Jesper Bendix
- Department of Chemistry University of Copenhagen 2100 Copenhagen Denmark
| | - Rodolphe Clérac
- Univ. Bordeaux, CNRS Centre de Recherche Paul Pascal, UMR 5031 33600 Pessac France
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19
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Pedersen KS, Meihaus KR, Rogalev A, Wilhelm F, Aravena D, Amoza M, Ruiz E, Long JR, Bendix J, Clérac R. Back Cover: [UF
6
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2−
: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments (Angew. Chem. Int. Ed. 44/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201911582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kasper S. Pedersen
- Univ. Bordeaux, CNRS Centre de Recherche Paul Pascal, UMR 5031 33600 Pessac France
- Department of Chemistry Technical University of Denmark, 2800 Kgs. Lyngby Denmark
| | - Katie R. Meihaus
- Department of Chemistry University of California Berkeley CA 94720 USA
| | - Andrei Rogalev
- ESRF–The European Synchrotron, 71, Avenue des Martyrs 38000 Grenoble Cedex 9 France
| | - Fabrice Wilhelm
- ESRF–The European Synchrotron, 71, Avenue des Martyrs 38000 Grenoble Cedex 9 France
| | - Daniel Aravena
- Departamento de Química de los Materiales Facultad de Química y Biología Universidad de Santiago de Chile (USACH) Casilla 40, Correo 33 Santiago Chile
| | - Martín Amoza
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Jeffrey R. Long
- Department of Chemistry University of California Berkeley CA 94720 USA
- Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Chemical and Biomolecular Engineering University of California Berkeley Berkeley CA 94720 USA
| | - Jesper Bendix
- Department of Chemistry University of Copenhagen 2100 Copenhagen Denmark
| | - Rodolphe Clérac
- Univ. Bordeaux, CNRS Centre de Recherche Paul Pascal, UMR 5031 33600 Pessac France
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20
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Pedersen KS, Meihaus KR, Rogalev A, Wilhelm F, Aravena D, Amoza M, Ruiz E, Long JR, Bendix J, Clérac R. Rücktitelbild: [UF
6
]
2−
: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments (Angew. Chem. 44/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kasper S. Pedersen
- Univ. Bordeaux, CNRS Centre de Recherche Paul Pascal, UMR 5031 33600 Pessac France
- Department of Chemistry Technical University of Denmark, 2800 Kgs. Lyngby Denmark
| | - Katie R. Meihaus
- Department of Chemistry University of California Berkeley CA 94720 USA
| | - Andrei Rogalev
- ESRF–The European Synchrotron, 71, Avenue des Martyrs 38000 Grenoble Cedex 9 France
| | - Fabrice Wilhelm
- ESRF–The European Synchrotron, 71, Avenue des Martyrs 38000 Grenoble Cedex 9 France
| | - Daniel Aravena
- Departamento de Química de los Materiales Facultad de Química y Biología Universidad de Santiago de Chile (USACH) Casilla 40, Correo 33 Santiago Chile
| | - Martín Amoza
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Jeffrey R. Long
- Department of Chemistry University of California Berkeley CA 94720 USA
- Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Chemical and Biomolecular Engineering University of California Berkeley Berkeley CA 94720 USA
| | - Jesper Bendix
- Department of Chemistry University of Copenhagen 2100 Copenhagen Denmark
| | - Rodolphe Clérac
- Univ. Bordeaux, CNRS Centre de Recherche Paul Pascal, UMR 5031 33600 Pessac France
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21
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Pedersen KS, Meihaus KR, Rogalev A, Wilhelm F, Aravena D, Amoza M, Ruiz E, Long JR, Bendix J, Clérac R. [UF 6 ] 2- : A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments. Angew Chem Int Ed Engl 2019; 58:15650-15654. [PMID: 31290580 DOI: 10.1002/anie.201905056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/14/2019] [Indexed: 11/08/2022]
Abstract
The first structurally characterized hexafluorido complex of a tetravalent actinide ion, the [UF6 ]2- anion, is reported in the (NEt4 )2 [UF6 ]⋅2 H2 O salt (1). The weak magnetic response of 1 results from both UIV spin and orbital contributions, as established by combining X-ray magnetic circular dichroism (XMCD) spectroscopy and bulk magnetization measurements. The spin and orbital moments are virtually identical in magnitude, but opposite in sign, resulting in an almost perfect cancellation, which is corroborated by ab initio calculations. This work constitutes the first experimental demonstration of a seemingly non-magnetic molecular actinide complex carrying sizable spin and orbital magnetic moments.
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Affiliation(s)
- Kasper S Pedersen
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, 33600, Pessac, France.,Department of Chemistry, Technical University of Denmark, 2800 Kgs., Lyngby, Denmark
| | - Katie R Meihaus
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Andrei Rogalev
- ESRF-The European Synchrotron, 71, Avenue des Martyrs, 38000, Grenoble Cedex 9, France
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron, 71, Avenue des Martyrs, 38000, Grenoble Cedex 9, France
| | - Daniel Aravena
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile
| | - Martín Amoza
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain
| | - Jeffrey R Long
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.,Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, CA, 94720, USA
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Rodolphe Clérac
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, 33600, Pessac, France
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22
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Ma X, Suturina EA, Rouzières M, Platunov M, Wilhelm F, Rogalev A, Clérac R, Dechambenoit P. Using Redox-Active π Bridging Ligand as a Control Switch of Intramolecular Magnetic Interactions. J Am Chem Soc 2019; 141:7721-7725. [PMID: 31025864 DOI: 10.1021/jacs.9b03044] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Intramolecular magnetic interactions in the dinuclear complexes [(tpy)Ni(tphz)Ni(tpy)] n+ ( n = 4, 3, and 2; tpy, terpyridine; tphz, tetrapyridophenazine) were tailored by changing the oxidation state of the pyrazine-based bridging ligand. While its neutral form mediates a weak antiferromagnetic (AF) coupling between the two S = 1 Ni(II), its reduced form, tphz•-, promotes a remarkably large ferromagnetic exchange of +214(5) K with Ni(II) spins. Reducing twice the bridging ligand affords weak Ni-Ni interactions, in marked contrast to the Co(II) analogue. Those experimental results, supported by a careful examination of the involved orbitals, provide a clear understanding of the factors which govern strength and sign of the magnetic exchange through an aromatic bridging ligand, a prerequisite for the rational design of strongly coupled molecular systems and high TC molecule-based magnets.
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Affiliation(s)
- Xiaozhou Ma
- CNRS, CRPP, UMR 5031, Pessac F-33600 , France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac F-33600 , France
| | - Elizaveta A Suturina
- Centre for Sustainable Chemical Technologies (CSCT) , University of Bath , Claverton Down, Bath BA2 7AY , United Kingdom
| | - Mathieu Rouzières
- CNRS, CRPP, UMR 5031, Pessac F-33600 , France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac F-33600 , France
| | - Mikhail Platunov
- ESRF-The European Synchrotron , CS 40220, 38043 Grenoble Cedex 9, France
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron , CS 40220, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- ESRF-The European Synchrotron , CS 40220, 38043 Grenoble Cedex 9, France
| | - Rodolphe Clérac
- CNRS, CRPP, UMR 5031, Pessac F-33600 , France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac F-33600 , France
| | - Pierre Dechambenoit
- CNRS, CRPP, UMR 5031, Pessac F-33600 , France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac F-33600 , France
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23
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Yannello V, Guillou F, Yaroslavtsev AA, Tener ZP, Wilhelm F, Yaresko AN, Molodtsov SL, Scherz A, Rogalev A, Shatruk M. Revisiting Bond Breaking and Making in EuCo
2
P
2
: Where are the Electrons? Chemistry 2019. [DOI: 10.1002/chem.201900863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vincent Yannello
- Department of Chemistry and BiochemistryFlorida State University 95 Chieftan Way Tallahassee FL 32306 USA
| | - Francois Guillou
- ESRF-The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
- Present address: Inner Mongolia Key Laboratory for Physics, and Chemistry of Functional MaterialsInner Mongolia Normal University No 81 Zhaowuda Road Hohhot P. R. China
| | - Alexander A. Yaroslavtsev
- European XFEL GmbH Holzkoppel 4 22869 Schenefeld Germany
- National Research Nuclear University “MEPhI” Kashirskoe shosse 31 115409 Moscow Russia
| | - Zachary P. Tener
- Department of Chemistry and BiochemistryFlorida State University 95 Chieftan Way Tallahassee FL 32306 USA
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
| | - Alexander N. Yaresko
- Max-Planck-Institut für Festkörperforschung Heisenbergstraße 1 70569 Stuttgart Germany
| | - Serguei L. Molodtsov
- European XFEL GmbH Holzkoppel 4 22869 Schenefeld Germany
- Institute of Experimental PhysicsTechnische Universität Bergakademie Freiberg 09599 Freiberg Germany
- ITMO University Kronverkskiy Prospect 49 197101 St. Petersburg Russia
| | - Andreas Scherz
- European XFEL GmbH Holzkoppel 4 22869 Schenefeld Germany
| | - Andrei Rogalev
- ESRF-The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
| | - Michael Shatruk
- Department of Chemistry and BiochemistryFlorida State University 95 Chieftan Way Tallahassee FL 32306 USA
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24
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Yannello V, Guillou F, Yaroslavtsev AA, Tener ZP, Wilhelm F, Yaresko AN, Molodtsov SL, Scherz A, Rogalev A, Shatruk M. Front Cover: Revisiting Bond Breaking and Making in EuCo
2
P
2
: Where are the Electrons? (Chem. Eur. J. 23/2019). Chemistry 2019. [DOI: 10.1002/chem.201900862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vincent Yannello
- Department of Chemistry and BiochemistryFlorida State University 95 Chieftan Way Tallahassee FL 32306 USA
| | - Francois Guillou
- ESRF-The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
- Present address: Inner Mongolia Key Laboratory for Physics, and Chemistry of Functional MaterialsInner Mongolia Normal University No 81 Zhaowuda Road Hohhot P. R. China
| | - Alexander A. Yaroslavtsev
- European XFEL GmbH Holzkoppel 4 22869 Schenefeld Germany
- National Research Nuclear University “MEPhI” Kashirskoe shosse 31 115409 Moscow Russia
| | - Zachary P. Tener
- Department of Chemistry and BiochemistryFlorida State University 95 Chieftan Way Tallahassee FL 32306 USA
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
| | - Alexander N. Yaresko
- Max-Planck-Institut für Festkörperforschung Heisenbergstraße 1 70569 Stuttgart Germany
| | - Serguei L. Molodtsov
- European XFEL GmbH Holzkoppel 4 22869 Schenefeld Germany
- Institute of Experimental PhysicsTechnische Universität Bergakademie Freiberg 09599 Freiberg Germany
- ITMO University Kronverkskiy Prospect 49 197101 St. Petersburg Russia
| | - Andreas Scherz
- European XFEL GmbH Holzkoppel 4 22869 Schenefeld Germany
| | - Andrei Rogalev
- ESRF-The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France
| | - Michael Shatruk
- Department of Chemistry and BiochemistryFlorida State University 95 Chieftan Way Tallahassee FL 32306 USA
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25
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Yannello V, Guillou F, Yaroslavtsev AA, Tener ZP, Wilhelm F, Yaresko AN, Molodtsov SL, Scherz A, Rogalev A, Shatruk M. Revisiting Bond Breaking and Making in EuCo 2 P 2 : Where are the Electrons? Chemistry 2019; 25:5865-5869. [PMID: 30714648 DOI: 10.1002/chem.201900244] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Indexed: 11/12/2022]
Abstract
X-ray absorption spectroscopy (XAS) was used to elucidate changes in the electronic structure caused by the pressure-induced structural collapse in EuCo2 P2 . The spectral changes observed at the L3 -edge of Eu and K-edges of Co and P suggest electron density redistribution, which contradicts the formal charges calculated from the commonly used Zintl-Klemm concept. Quantum-chemical calculations show that, despite the increase in the oxidation state of Eu and the formation of a weak P-P bond in the high-pressure phase, the electron transfer from the Eu 4f orbitals to the hybridized 5d and 6s states causes strengthening of the Eu-P and P-P bonds. These changes explain the increased electron density on P atoms, deduced from the P K-edge XAS spectra. This work shows that the formal electron counting schemes do not provide an adequate description of changes associated with phase transitions in metallic systems with substantial mixing of the electronic states.
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Affiliation(s)
- Vincent Yannello
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL, 32306, USA
| | - Francois Guillou
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France.,Present address: Inner Mongolia Key Laboratory for Physics, and Chemistry of Functional Materials, Inner Mongolia Normal University, No 81 Zhaowuda Road, Hohhot, P. R. China
| | - Alexander A Yaroslavtsev
- European XFEL GmbH, Holzkoppel 4, 22869, Schenefeld, Germany.,National Research Nuclear University "MEPhI", Kashirskoe shosse 31, 115409, Moscow, Russia
| | - Zachary P Tener
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL, 32306, USA
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Alexander N Yaresko
- Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569, Stuttgart, Germany
| | - Serguei L Molodtsov
- European XFEL GmbH, Holzkoppel 4, 22869, Schenefeld, Germany.,Institute of Experimental Physics, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany.,ITMO University, Kronverkskiy Prospect 49, 197101, St. Petersburg, Russia
| | - Andreas Scherz
- European XFEL GmbH, Holzkoppel 4, 22869, Schenefeld, Germany
| | - Andrei Rogalev
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Michael Shatruk
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL, 32306, USA
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26
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Rodriguez-Lamas R, Pla D, Chaix-Pluchery O, Meunier B, Wilhelm F, Rogalev A, Rapenne L, Mescot X, Rafhay Q, Roussel H, Boudard M, Jiménez C, Burriel M. Integration of LaMnO 3+δ films on platinized silicon substrates for resistive switching applications by PI-MOCVD. Beilstein J Nanotechnol 2019; 10:389-398. [PMID: 30800578 PMCID: PMC6369995 DOI: 10.3762/bjnano.10.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
The next generation of electronic devices requires faster operation velocity, higher storage capacity and reduction of the power consumption. In this context, resistive switching memory chips emerge as promising candidates for developing new non-volatile memory modules. Manganites have received increasing interest as memristive material as they exhibit a remarkable switching response. Nevertheless, their integration in CMOS-compatible substrates, such as silicon wafers, requires further effort. Here the integration of LaMnO3+δ as memristive material in a metal-insulator-metal structure is presented using a silicon-based substrate and the pulsed injection metal organic chemical vapour deposition technique. We have developed three different growth strategies with which we are able to tune the oxygen content and Mn oxidation state moving from an orthorhombic to a rhombohedral structure for the active LaMnO3+δ material. Furthermore, a good resistive switching response has been obtained for LaMnO3+δ-based devices fabricated using optimized growth strategies.
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Affiliation(s)
- Raquel Rodriguez-Lamas
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Dolors Pla
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Odette Chaix-Pluchery
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Benjamin Meunier
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF), F-38054 Grenoble, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), F-38054 Grenoble, France
| | - Laetitia Rapenne
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Xavier Mescot
- Univ. Grenoble Alpes, CNRS, IMEP-LAHC, F-38000 Grenoble, France
| | - Quentin Rafhay
- Univ. Grenoble Alpes, CNRS, IMEP-LAHC, F-38000 Grenoble, France
| | - Hervé Roussel
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Michel Boudard
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Carmen Jiménez
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
| | - Mónica Burriel
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LMGP, F-38000 Grenoble, France
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27
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Mitcov D, Pedersen AH, Ceccato M, Gelardi RM, Hassenkam T, Konstantatos A, Reinholdt A, Sørensen MA, Thulstrup PW, Vinum MG, Wilhelm F, Rogalev A, Wernsdorfer W, Brechin EK, Piligkos S. Molecular multifunctionality preservation upon surface deposition for a chiral single-molecule magnet. Chem Sci 2019; 10:3065-3073. [PMID: 30996888 PMCID: PMC6428142 DOI: 10.1039/c8sc04917c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 01/23/2019] [Indexed: 01/06/2023] Open
Abstract
Simultaneous retention of SMM behaviour and of optical activity is demonstrated upon surface deposition for a chiral SMM.
The synthesis and characterization of a chiral, enneanuclear Mn(iii)-based, Single-Molecule Magnet, [Mn9O4(Me-sao)6(L)3(MeO)3(MeOH)3]Cl (1; Me-saoH2 = methylsalicylaldoxime, HL = lipoic acid) is reported. Compound 1 crystallizes in the orthorhombic P212121 space group and consists of a metallic skeleton describing a defect super-tetrahedron missing one vertex. The chirality of the [MnIII9] core originates from the directional bridging of the Me-sao2– ligands via the –N–O– oximate moieties, which define a clockwise (1ΔΔ) or counter-clockwise (1ΛΛ) rotation in both the upper [MnIII3] and lower [MnIII6] subunits. Structural integrity and retention of chirality upon dissolution and upon deposition on (a) gold nanoparticles, 1@AuNPs, (b) transparent Au(111) surfaces, 1ΛΛ@t-Au(111); 1ΔΔ@t-Au(111), and (c) epitaxial Au(111) on mica surfaces, 1@e-Au(111), was confirmed by CD and IR spectroscopies, mass spectrometry, TEM, XPS, XAS, and AFM. Magnetic susceptibility and magnetization measurements demonstrate the simultaneous retention of SMM behaviour and optical activity, from the solid state, via dissolution, to the surface deposited species.
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Affiliation(s)
- Dmitri Mitcov
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Anders H Pedersen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Marcel Ceccato
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Rikke M Gelardi
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Tue Hassenkam
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Andreas Konstantatos
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Anders Reinholdt
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Mikkel A Sørensen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Peter W Thulstrup
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Morten G Vinum
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron , CS 40220 , 38043 Grenoble Cedex 9 , France
| | - Andrei Rogalev
- ESRF-The European Synchrotron , CS 40220 , 38043 Grenoble Cedex 9 , France
| | - Wolfgang Wernsdorfer
- Institute Néel , CNRS , BP 166 , 25 Avenue de Martyrs , Grenoble , 38042 Cedex 9 , France
| | - Euan K Brechin
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh , EH9 3FJ , UK
| | - Stergios Piligkos
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , Copenhagen , Denmark .
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28
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Jafri SF, Koumousi ES, Arrio MA, Juhin A, Mitcov D, Rouzières M, Dechambenoit P, Li D, Otero E, Wilhelm F, Rogalev A, Joly L, Kappler JP, Cartier dit Moulin C, Mathonière C, Clérac R, Sainctavit P. Atomic Scale Evidence of the Switching Mechanism in a Photomagnetic CoFe Dinuclear Prussian Blue Analogue. J Am Chem Soc 2018; 141:3470-3479. [DOI: 10.1021/jacs.8b10484] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Sadaf Fatima Jafri
- IMPMC, CNRS, Sorbonne Université, IRD, MNHN, UMR7590, F-75005 Paris, France
| | - Evangelia S. Koumousi
- CNRS, ICMCB, UMR5026, F-33600 Pessac, France
- Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France
- CNRS, CRPP, UMR5031, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UMR5031, F-33600 Pessac, France
| | - Marie-Anne Arrio
- IMPMC, CNRS, Sorbonne Université, IRD, MNHN, UMR7590, F-75005 Paris, France
| | - Amélie Juhin
- IMPMC, CNRS, Sorbonne Université, IRD, MNHN, UMR7590, F-75005 Paris, France
| | - Dmitri Mitcov
- CNRS, CRPP, UMR5031, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UMR5031, F-33600 Pessac, France
| | - Mathieu Rouzières
- CNRS, CRPP, UMR5031, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UMR5031, F-33600 Pessac, France
| | - Pierre Dechambenoit
- CNRS, CRPP, UMR5031, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UMR5031, F-33600 Pessac, France
| | - Dongfeng Li
- College of Chemistry, Central China Normal University, 430079 Wuhan, P. R. China
| | - Edwige Otero
- Synchrotron SOLEIL, L’Orme des Merisiers, F-91192 Saint-Aubin, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
| | - Loïc Joly
- Synchrotron SOLEIL, L’Orme des Merisiers, F-91192 Saint-Aubin, France
- Université de Strasbourg, CNRS, IPCMS, UMR7504, F-67000 Strasbourg, France
| | - Jean-Paul Kappler
- Synchrotron SOLEIL, L’Orme des Merisiers, F-91192 Saint-Aubin, France
- Université de Strasbourg, CNRS, IPCMS, UMR7504, F-67000 Strasbourg, France
| | | | - Corine Mathonière
- CNRS, ICMCB, UMR5026, F-33600 Pessac, France
- Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France
| | - Rodolphe Clérac
- CNRS, CRPP, UMR5031, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UMR5031, F-33600 Pessac, France
| | - Philippe Sainctavit
- IMPMC, CNRS, Sorbonne Université, IRD, MNHN, UMR7590, F-75005 Paris, France
- Synchrotron SOLEIL, L’Orme des Merisiers, F-91192 Saint-Aubin, France
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29
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Perlepe P, Oyarzabal I, Pedersen KS, Negrier P, Mondieig D, Rouzières M, Hillard EA, Wilhelm F, Rogalev A, Suturina EA, Mathonière C, Clérac R. Cr(pyrazine)2(OSO2CH3)2: A two-dimensional coordination polymer with an antiferromagnetic ground state. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.07.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Pedersen KS, Perlepe P, Aubrey ML, Woodruff DN, Reyes-Lillo SE, Reinholdt A, Voigt L, Li Z, Borup K, Rouzières M, Samohvalov D, Wilhelm F, Rogalev A, Neaton JB, Long JR, Clérac R. Formation of the layered conductive magnet CrCl 2(pyrazine) 2 through redox-active coordination chemistry. Nat Chem 2018; 10:1056-1061. [PMID: 30202103 DOI: 10.1038/s41557-018-0107-7] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 06/05/2018] [Indexed: 11/09/2022]
Abstract
The unique properties of graphene, transition-metal dichalcogenides and other two-dimensional (2D) materials have boosted interest in layered coordination solids. In particular, 2D materials that behave as both conductors and magnets could find applications in quantum magnetoelectronics and spintronics. Here, we report the synthesis of CrCl2(pyrazine)2, an air-stable layered solid, by reaction of CrCl2 with pyrazine (pyz). This compound displays a ferrimagnetic order below ∼55 K, reflecting the presence of strong magnetic interactions. Electrical conductivity measurements demonstrate that CrCl2(pyz)2 reaches a conductivity of 32 mS cm-1 at room temperature, which operates through a 2D hopping-based transport mechanism. These properties are induced by the redox-activity of the pyrazine ligand, which leads to a smearing of the Cr 3d and pyrazine π states. We suggest that the combination of redox-active ligands and reducing paramagnetic metal ions represents a general approach towards tuneable 2D materials that consist of charge-neutral layers and exhibit both long-range magnetic order and high electronic conductivity.
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Affiliation(s)
- Kasper S Pedersen
- CNRS, CRPP, UMR 5031, Pessac, France. .,Univ. Bordeaux, CRPP, UMR 5031, Pessac, France. .,Department of Chemistry, Technical University of Denmark, Lyngby, Denmark.
| | - Panagiota Perlepe
- CNRS, CRPP, UMR 5031, Pessac, France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac, France.,CNRS, ICMCB, UMR 5026, Pessac, France.,Univ. Bordeaux, ICMCB, UMR 5026, Pessac, France
| | - Michael L Aubrey
- Department of Chemistry, University of California Berkeley, Berkeley, CA, USA
| | | | - Sebastian E Reyes-Lillo
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,Department of Physics, University of California Berkeley, Berkeley, CA, USA.,Departamento de Ciencias Físicas, Universidad Andres Bello, Santiago, Chile
| | - Anders Reinholdt
- Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| | - Laura Voigt
- Department of Chemistry, Technical University of Denmark, Lyngby, Denmark
| | - Zheshen Li
- Department of Physics and Astronomy - Centre for Storage Ring Facilities (ISA), Aarhus University, Aarhus, Denmark
| | - Kasper Borup
- Center for Materials Crystallography, Department of Chemistry and iNano, Aarhus, Denmark
| | - Mathieu Rouzières
- CNRS, CRPP, UMR 5031, Pessac, France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac, France
| | - Dumitru Samohvalov
- CNRS, CRPP, UMR 5031, Pessac, France.,Univ. Bordeaux, CRPP, UMR 5031, Pessac, France.,Sara Pharm Solutions, Bucharest, Romania
| | | | | | - Jeffrey B Neaton
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.,Department of Physics, University of California Berkeley, Berkeley, CA, USA.,Kavli Energy Nanosciences Institute at Berkeley, Berkeley, CA, USA
| | - Jeffrey R Long
- Department of Chemistry, University of California Berkeley, Berkeley, CA, USA.,Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, CA, USA.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Rodolphe Clérac
- CNRS, CRPP, UMR 5031, Pessac, France. .,Univ. Bordeaux, CRPP, UMR 5031, Pessac, France.
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31
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Wawro A, Milińska E, Kurant Z, Pietruczik A, Kanak J, Ollefs K, Wilhelm F, Rogalev A, Maziewski A. XMCD studies of magnetic polarization at Mo atoms in CoMo alloy and magnetically coupled Co/Mo multilayers. J Synchrotron Radiat 2018; 25:1400-1407. [PMID: 30179179 DOI: 10.1107/s1600577518008500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Magnetic polarization of Mo atoms in Co96Mo4 alloy film and Co/Mo multilayered structures has been studied by X-ray magnetic circular dichroism. Samples with Mo spacers of two different thicknesses (0.9 nm and 1.8 nm) were investigated. Mo atoms receive a magnetic moment of -0.21μB in the alloy. In the multilayer with the thinner Mo spacer (dMo = 0.9 nm) the magnetic moment is much smaller (-0.03μB). In both cases the measured induced moment at the Mo site is oriented antiparallel to the moment at the Co atoms. The presence of the induced moment in the Mo spacer coincides with antiferromagnetic coupling between the Co component slabs. In contrast, neither measurable induced moment at the Mo site nor interlayer coupling between the Co layers has been found for the multilayer with the thicker Mo spacer. Possible mechanisms of the coupling associated with the induced moment are discussed in detail.
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Affiliation(s)
- Andrzej Wawro
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL-02668, Poland
| | - Ewelina Milińska
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL-02668, Poland
| | - Zbigniew Kurant
- Department of Physics, University of Białystok, ul. Ciołkowskiego 1L, Białystok 15-245, Poland
| | - Aleksiej Pietruczik
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL-02668, Poland
| | - Jarosław Kanak
- Department of Electronics, AGH University of Science and Technology, Al. Mickiewicza 30, Kraków 30-059, Poland
| | - Katharina Ollefs
- European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Andrzej Maziewski
- Department of Physics, University of Białystok, ul. Ciołkowskiego 1L, Białystok 15-245, Poland
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32
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Guillou F, Pathak AK, Paudyal D, Mudryk Y, Wilhelm F, Rogalev A, Pecharsky VK. Non-hysteretic first-order phase transition with large latent heat and giant low-field magnetocaloric effect. Nat Commun 2018; 9:2925. [PMID: 30050115 PMCID: PMC6062548 DOI: 10.1038/s41467-018-05268-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/18/2018] [Indexed: 11/09/2022] Open
Abstract
First-order magnetic transitions (FOMTs) with a large discontinuity in magnetization are highly sought in the development of advanced functional magnetic materials. Isosymmetric magnetoelastic FOMTs that do not perturb crystal symmetry are especially rare, and only a handful of material families, almost exclusively transition metal-based, are known to exhibit them. Yet, here we report a surprising isosymmetric FOMT in a rare-earth intermetallic, Eu2In. What makes this transition in Eu2In even more remarkable is that it is associated with a large latent heat and an exceptionally high magnetocaloric effect in low magnetic fields, but with tiny lattice discontinuities and negligible hysteresis. An active role of the Eu-5d and In-4p states and a rather unique electronic structure borne by In to Eu charge transfer, altogether result in an unusual exchange mechanism that both sets the transition in motion and unveils an approach toward developing specific magnetic functionalities ad libitum.
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Affiliation(s)
- F Guillou
- The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA, 50011-2416, USA.
| | - A K Pathak
- The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA, 50011-2416, USA
| | - D Paudyal
- The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA, 50011-2416, USA
| | - Y Mudryk
- The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA, 50011-2416, USA
| | - F Wilhelm
- ESRF, The European Synchrotron, 71 Av. des Martyrs, 38000, Grenoble, France
| | - A Rogalev
- ESRF, The European Synchrotron, 71 Av. des Martyrs, 38000, Grenoble, France
| | - V K Pecharsky
- The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA, 50011-2416, USA.,Department of Materials Science and Engineering, Iowa State University, Ames, IA, 50011-1096, USA
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33
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Hillard EA, Buffeteau T, Bulicanu V, Clérac R, Cortijo M, Daugey N, Naim A, Rogalev A, Rosa P, Sainctavit P, Srinivasan A, Valentín-Pérez A, Wilhelm F. Enantiomeric resolution of helicochiral paddlewheel complexes and their infrared, Raman, UV–vis and X-ray optical activity. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s0108767318098914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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34
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Averyanov DV, Parfenov OE, Tokmachev AM, Karateev IA, Kondratev OA, Taldenkov AN, Platunov MS, Wilhelm F, Rogalev A, Storchak VG. Fine structure of metal-insulator transition in EuO resolved by doping engineering. Nanotechnology 2018; 29:195706. [PMID: 29469062 DOI: 10.1088/1361-6528/aab16e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Metal-insulator transitions (MITs) offer new functionalities for nanoelectronics. However, ongoing attempts to control the resistivity by external stimuli are hindered by strong coupling of spin, charge, orbital and lattice degrees of freedom. This difficulty presents a quest for materials which exhibit MIT caused by a single degree of freedom. In the archetypal ferromagnetic semiconductor EuO, magnetic orders dominate the MIT. Here we report a new approach to take doping under control in this material on the nanoscale: formation of oxygen vacancies is strongly suppressed to exhibit the highest MIT resistivity jump and magnetoresistance among thin films. The nature of the MIT is revealed in Gd doped films. The critical doping is determined to be more than an order of magnitude lower than in all previous studies. In lightly doped films, a remarkable thermal hysteresis in resistivity is discovered. It extends over 100 K in the paramagnetic phase reaching 3 orders of magnitude. In the warming mode, the MIT is shown to be a two-step process. The resistivity patterns are consistent with an active role of magnetic polarons-formation of a narrow band and its thermal destruction. High-temperature magnetic polaron effects include large negative magnetoresistance and ferromagnetic droplets revealed by x-ray magnetic circular dichroism. Our findings have wide-range implications for the understanding of strongly correlated oxides and establish fundamental benchmarks to guide theoretical models of the MIT.
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Affiliation(s)
- Dmitry V Averyanov
- National Research Center 'Kurchatov Institute', Kurchatov Sq. 1, Moscow 123182, Russia
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35
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Oreshko AP, Mill BV, Ovchinnikova EN, Rogalev A, Wilhelm F, Dmitrienko VE. X-Ray Natural Circular Dichroism in Langasite Crystal at the Ga and La Edges. CRYSTALLOGR REP+ 2018. [DOI: 10.1134/s1063774518020189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Srinivasan A, Cortijo M, Bulicanu V, Naim A, Clérac R, Sainctavit P, Rogalev A, Wilhelm F, Rosa P, Hillard EA. Enantiomeric resolution and X-ray optical activity of a tricobalt extended metal atom chain. Chem Sci 2018; 9:1136-1143. [PMID: 29675158 PMCID: PMC5884025 DOI: 10.1039/c7sc04131d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 12/04/2017] [Indexed: 11/29/2022] Open
Abstract
A simple procedure based on anion exchange was employed for the enantiomeric resolution of the extended metal atom chain (EMAC) [Co3(dpa)4(MeCN)2]2+. Use of the chiral salt (NBu4)2[As2(tartrate)2], (Λ-1 or Δ-1), resulted in the selective crystallization of the EMAC enantiomers as [Δ-Co3(dpa)4(MeCN)2](NBu4)2[Λ-As2(tartarte)2]2, (Δ-2) and [Λ-Co3(dpa)4(MeCN)2](NBu4)2[Δ-As2(tartrate)2]2 (Λ-2), respectively, in the P4212 space group, whereas a racemic mixture of 1 yielded [Co3(dpa)4(MeCN)2][As2(tartrate)2]·2MeCN (rac-3), which crystallized in the C2/c space group. The local electronic and magnetic structure of the EMAC enantiomers was studied, exploiting a variety of dichroisms in single crystals. A strong linear dichroism at the Co K-edge was observed in the orthoaxial configuration, whereas it vanished in the axial orientation, thus spectroscopically confirming the D4 crystal symmetry. Compounds Δ-2 and Λ-2 are shown to be enantiopure materials as evidenced by mirror-image natural circular dichroism spectra in the UV/vis in solution and in the X-ray range at the Co K-edge in single crystals. The surprising absence of detectable X-ray magnetic circular dichroism or X-ray magnetochiral dichroism signals at the Co K-edge, even at low temperature (3 K) and a high magnetic field (17 T), is ascribed to a strongly delocalized spin density on the tricobalt core.
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Affiliation(s)
- Anandi Srinivasan
- CNRS , CRPP , UPR 8641 , F-33600 Pessac , France .
- Univ. Bordeaux , CRPP , UPR 8641 , F-33600 Pessac , France
| | - Miguel Cortijo
- CNRS , CRPP , UPR 8641 , F-33600 Pessac , France .
- Univ. Bordeaux , CRPP , UPR 8641 , F-33600 Pessac , France
- CNRS , ICMCB , UPR 9048 , F-33600 Pessac , France
- Univ. Bordeaux , ICMCB , UPR 9048 , F-33600 Pessac , France
| | - Vladimir Bulicanu
- CNRS , CRPP , UPR 8641 , F-33600 Pessac , France .
- Univ. Bordeaux , CRPP , UPR 8641 , F-33600 Pessac , France
| | - Ahmad Naim
- CNRS , ICMCB , UPR 9048 , F-33600 Pessac , France
- Univ. Bordeaux , ICMCB , UPR 9048 , F-33600 Pessac , France
| | - Rodolphe Clérac
- CNRS , CRPP , UPR 8641 , F-33600 Pessac , France .
- Univ. Bordeaux , CRPP , UPR 8641 , F-33600 Pessac , France
| | - Philippe Sainctavit
- Institut de Mineralogie , de Physique des Materiaux et de Cosmochimie , UMR 7590 , CNRS , UPMC , IRD , MNHN , F-75005 Paris , France .
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF) , F-38043 Grenoble , France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF) , F-38043 Grenoble , France
| | - Patrick Rosa
- CNRS , ICMCB , UPR 9048 , F-33600 Pessac , France
- Univ. Bordeaux , ICMCB , UPR 9048 , F-33600 Pessac , France
| | - Elizabeth A Hillard
- CNRS , CRPP , UPR 8641 , F-33600 Pessac , France .
- Univ. Bordeaux , CRPP , UPR 8641 , F-33600 Pessac , France
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37
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Oreshko AP, Ovchinnikova EN, Rogalev A, Wilhelm F, Mill BV, Dmitrienko VE. X-ray natural circular dichroism in langasite crystal. J Synchrotron Radiat 2018; 25:222-231. [PMID: 29271771 DOI: 10.1107/s1600577517015387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/23/2017] [Indexed: 06/07/2023]
Abstract
Optical activity in the X-ray range stems from the electric-dipole-electric-quadrupole interference terms mixing multipoles of opposite parity, and can be observed exclusively in systems with broken inversion symmetry. The gyration tensor formalism is used to describe the X-ray optical activity in langasite La3Ga5SiO14 crystal with the P321 space group. An experimental study of the X-ray natural circular dichroism (XNCD) near the Ga K-edge in La3Ga5SiO14 single crystal was performed at ESRF beamline ID12, both along and perpendicular to the crystal optical axis. The combination of the quantum mechanical calculations and high-quality experimental results has allowed us to separate the contributions into X-ray absorption and XNCD spectra of Ga atoms occupying three distinct Wyckoff positions.
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Affiliation(s)
- Alexey P Oreshko
- Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russian Federation
| | - Elena N Ovchinnikova
- Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russian Federation
| | - Andrei Rogalev
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, Grenoble 38043, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, Grenoble 38043, France
| | - Boris V Mill
- Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russian Federation
| | - Vladimir E Dmitrienko
- A. V. Shubnikov Institute of Crystallography, Federal Scientific Research Centre `Crystallography and Photonics' of Russian Academy of Sciences, Leninskiy Prospekt 59, Moscow 119333, Russian Federation
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38
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Magnani N, Eloirdi R, Wilhelm F, Colineau E, Griveau JC, Shick AB, Lander GH, Rogalev A, Caciuffo R. Probing Magnetism in the Vortex Phase of PuCoGa_{5} by X-Ray Magnetic Circular Dichroism. Phys Rev Lett 2017; 119:157204. [PMID: 29077471 DOI: 10.1103/physrevlett.119.157204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Indexed: 06/07/2023]
Abstract
We measure x-ray magnetic circular dichroism (XMCD) spectra at the Pu M_{4,5} absorption edges from a newly prepared high-quality single crystal of the heavy-fermion superconductor ^{242}PuCoGa_{5}, exhibiting a critical temperature T_{c}=18.7 K. The experiment probes the vortex phase below T_{c} and shows that an external magnetic field induces a Pu 5f magnetic moment at 2 K equal to the temperature-independent moment measured in the normal phase up to 300 K by a superconducting quantum interference device. This observation is in agreement with theoretical models claiming that the Pu atoms in PuCoGa_{5} have a nonmagnetic singlet ground state resulting from the hybridization of the conduction electrons with the intermediate-valence 5f electronic shell. Unexpectedly, XMCD spectra show that the orbital component of the 5f magnetic moment increases significantly between 30 and 2 K; the antiparallel spin component increases as well, leaving the total moment practically constant. We suggest that this indicates a low-temperature breakdown of the complete Kondo-like screening of the local 5f moment.
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Affiliation(s)
- N Magnani
- European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Postfach 2340, D-76125 Karlsruhe, Germany
| | - R Eloirdi
- European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Postfach 2340, D-76125 Karlsruhe, Germany
| | - F Wilhelm
- European Synchrotron Radiation Facility (ESRF), B.P.220, F-38043 Grenoble, France
| | - E Colineau
- European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Postfach 2340, D-76125 Karlsruhe, Germany
| | - J-C Griveau
- European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Postfach 2340, D-76125 Karlsruhe, Germany
| | - A B Shick
- Institute of Physics, ASCR, Na Slovance 2, CZ-18221 Prague, Czech Republic
| | - G H Lander
- European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Postfach 2340, D-76125 Karlsruhe, Germany
| | - A Rogalev
- European Synchrotron Radiation Facility (ESRF), B.P.220, F-38043 Grenoble, France
| | - R Caciuffo
- European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Postfach 2340, D-76125 Karlsruhe, Germany
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39
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Ovsyannikov SV, Bykova E, Pakhomova A, Kozlenko DP, Bykov M, Kichanov SE, Morozova NV, Korobeinikov IV, Wilhelm F, Rogalev A, Tsirlin AA, Kurnosov AV, Zainulin YG, Kadyrova NI, Tyutyunnik AP, Dubrovinsky L. Structural and Magnetic Transitions in CaCo 3V 4O 12 Perovskite at Extreme Conditions. Inorg Chem 2017; 56:6251-6263. [PMID: 28520414 DOI: 10.1021/acs.inorgchem.7b00330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigated the structural, vibrational, magnetic, and electronic properties of the recently synthesized CaCo3V4O12 double perovskite with the high-spin (HS) Co2+ ions in a square-planar oxygen coordination at extreme conditions of high pressures and low temperatures. The single-crystal X-ray diffraction and Raman spectroscopy studies up to 60 GPa showed a conservation of its cubic crystal structure but indicated a crossover near 30 GPa. Above 30 GPa, we observed both an abnormally high "compressibility" of the Co-O bonds in the square-planar oxygen coordination and a huge anisotropic displacement of HS-Co2+ ions in the direction perpendicular to the oxygen planes. Although this effect is reminiscent of a continuous HS → LS transformation of the Co2+ ions, it did not result in the anticipated shrinkage of the cell volume because of a certain "stiffing" of the bonds of the Ca and V cations. We verified that the oxidation states of all the cations did not change across this crossover, and hence, no charge-transfer effects were involved. Consequently, we proposed that CaCo3V4O12 could undergo a phase transition at which the large HS-Co2+ ions were pushed out of the oxygen planes because of lattice compression. The antiferromagnetic transition in CaCo3V4O12 at 100 K was investigated by neutron powder diffraction at ambient pressure. We established that the magnetic moments of the Co2+ ions were aligned along one of the cubic axes, and the magnetic structure had a 2-fold periodicity along this axis, compared to the crystallographic one.
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Affiliation(s)
- Sergey V Ovsyannikov
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany.,Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Elena Bykova
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany.,Deutsches Elektronen-Synchrotron (DESY) , D-22603 Hamburg, Germany
| | - Anna Pakhomova
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany.,Deutsches Elektronen-Synchrotron (DESY) , D-22603 Hamburg, Germany
| | - Denis P Kozlenko
- Frank Laboratory of Neutron Physics, JINR , 141980 Dubna, Russia
| | - Maxim Bykov
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany
| | | | - Natalia V Morozova
- Institute of Metal Physics of Russian Academy of Sciences , Urals Division, GSP-170, 18 S. Kovalevskaya Str., Yekaterinburg 620990, Russia
| | - Igor V Korobeinikov
- Institute of Metal Physics of Russian Academy of Sciences , Urals Division, GSP-170, 18 S. Kovalevskaya Str., Yekaterinburg 620990, Russia
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility , 71, avenue des Martyrs CS 40220, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility , 71, avenue des Martyrs CS 40220, 38043 Grenoble Cedex 9, France
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg , 86135 Augsburg, Germany
| | - Alexander V Kurnosov
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany
| | - Yury G Zainulin
- Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Nadezda I Kadyrova
- Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Alexander P Tyutyunnik
- Institute for Solid State Chemistry of Russian Academy of Sciences , Urals Division, 91 Pervomayskaya Str., Yekaterinburg 620990, Russia
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, Universität Bayreuth , Universitätsstrasse 30, Bayreuth D-95447, Germany
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40
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Juhin A, Sainctavit P, Ollefs K, Sikora M, Filipponi A, Glatzel P, Wilhelm F, Rogalev A. X-ray magnetic circular dichroism measured at the Fe K-edge with a reduced intrinsic broadening: x-ray absorption spectroscopy versus resonant inelastic x-ray scattering measurements. J Phys Condens Matter 2016; 28:505202. [PMID: 27783570 DOI: 10.1088/0953-8984/28/50/505202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
X-ray magnetic circular dichroism is measured at the Fe K pre-edge in yttrium iron garnet using two different procedures that allow reducing the intrinsic broadening due to the 1s corehole lifetime. First, deconvolution of XMCD data measured in total fluorescence yield (TFY) with an extremely high signal-to-noise ratio enables a factor of 2.4 to be gained in the XMCD intensity. Ligand field multiplet calculations performed with different values of intrinsic broadening show that deconvolving such high quality XMCD data is similar to reducing the lifetime broadening from a 1s corehole to a 2p corehole. Second, MCD is measured by resonant inelastic x-ray scattering spectroscopy as a function of incident energy and emission energy. Selection of a fixed emission energy, instead of using the TFY, allows enhancing the MCD intensity up to a factor of ∼4.7. However, this significantly changes the spectral shape of the XMCD signal, which cannot be interpreted any more as an absorption spectrum.
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Affiliation(s)
- Amélie Juhin
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Universités, UMR CNRS 7590, UPMC Univ Paris 06, Muséum National d'Histoire Naturelle, IRD UMR206, 4 Place Jussieu, F-75005 Paris, France
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Pedersen KS, Bendix J, Tressaud A, Durand E, Weihe H, Salman Z, Morsing TJ, Woodruff DN, Lan Y, Wernsdorfer W, Mathonière C, Piligkos S, Klokishner SI, Ostrovsky S, Ollefs K, Wilhelm F, Rogalev A, Clérac R. Iridates from the molecular side. Nat Commun 2016; 7:12195. [PMID: 27435800 PMCID: PMC4961767 DOI: 10.1038/ncomms12195] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 06/07/2016] [Indexed: 11/09/2022] Open
Abstract
New exotic phenomena have recently been discovered in oxides of paramagnetic Ir4+ ions, widely known as ‘iridates'. Their remarkable properties originate from concerted effects of the crystal field, magnetic interactions and strong spin-orbit coupling, characteristic of 5d metal ions. Despite numerous experimental reports, the electronic structure of these materials is still challenging to elucidate, and not attainable in the isolated, but chemically inaccessible, [IrO6]8– species (the simplest molecular analogue of the elementary {IrO6}8− fragment present in all iridates). Here, we introduce an alternative approach to circumvent this problem by substituting the oxide ions in [IrO6]8− by isoelectronic fluorides to form the fluorido-iridate: [IrF6]2−. This molecular species has the same electronic ground state as the {IrO6}8− fragment, and thus emerges as an ideal model for iridates. These results may open perspectives for using fluorido-iridates as building-blocks for electronic and magnetic quantum materials synthesized by soft chemistry routes. Iridates are known to exhibit a range of exotic electronic and magnetic behaviours but it is difficult to prepare isolated [IrO6]8− species via soft chemical routes. Here, the authors isolate the isoelectronic [IrF6]2− complex, and assess it as a model and for iridate analogues.
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Affiliation(s)
- Kasper S Pedersen
- CNRS, ICMCB, UPR 9048, Pessac 33600, France.,Univ. Bordeaux, CRPP, UPR 8641, Pessac 33600, France.,CNRS, ICMCB, UPR 9048, Pessac 33600, France.,Univ. Bordeaux, ICMCB, UPR 9048, Pessac 33600, France
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Alain Tressaud
- CNRS, ICMCB, UPR 9048, Pessac 33600, France.,Univ. Bordeaux, ICMCB, UPR 9048, Pessac 33600, France
| | - Etienne Durand
- CNRS, ICMCB, UPR 9048, Pessac 33600, France.,Univ. Bordeaux, ICMCB, UPR 9048, Pessac 33600, France
| | - Høgni Weihe
- Department of Chemistry, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Zaher Salman
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut, Villigen PSI CH-5232, Switzerland
| | - Thorbjørn J Morsing
- Department of Chemistry, University of Copenhagen, Copenhagen DK-2100, Denmark
| | | | - Yanhua Lan
- CNRS, Inst NEEL, Grenoble F-38000, France
| | | | - Corine Mathonière
- CNRS, ICMCB, UPR 9048, Pessac 33600, France.,Univ. Bordeaux, ICMCB, UPR 9048, Pessac 33600, France
| | - Stergios Piligkos
- Department of Chemistry, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Sophia I Klokishner
- Institute of Applied Physics, Academy of Sciences of Moldova, Kishinev 2028, Moldova
| | - Serghei Ostrovsky
- Institute of Applied Physics, Academy of Sciences of Moldova, Kishinev 2028, Moldova
| | - Katharina Ollefs
- ESRF - The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France
| | - Fabrice Wilhelm
- ESRF - The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- ESRF - The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France
| | - Rodolphe Clérac
- CNRS, ICMCB, UPR 9048, Pessac 33600, France.,Univ. Bordeaux, CRPP, UPR 8641, Pessac 33600, France
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Mihalcea I, Perfetti M, Pineider F, Tesi L, Mereacre V, Wilhelm F, Rogalev A, Anson CE, Powell AK, Sessoli R. Spin Helicity in Chiral Lanthanide Chains. Inorg Chem 2016; 55:10068-10074. [DOI: 10.1021/acs.inorgchem.6b01010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ionut Mihalcea
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Mauro Perfetti
- Department of Chemistry, “U. Schiff” Università di Firenze and INSTM RU Firenze via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Francesco Pineider
- Department of Chemistry, “U. Schiff” Università di Firenze and INSTM RU Firenze via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 3, 56124 Pisa, Italy
| | - Lorenzo Tesi
- Department of Chemistry, “U. Schiff” Università di Firenze and INSTM RU Firenze via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Valeriu Mereacre
- Institute of Inorganic
Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
| | - Christopher E. Anson
- Institute of Inorganic
Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Annie K. Powell
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
- Institute of Inorganic
Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany
| | - Roberta Sessoli
- Department of Chemistry, “U. Schiff” Università di Firenze and INSTM RU Firenze via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
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O'Neil BH, Scott AJ, Ma WW, Cohen SJ, Aisner DL, Menter AR, Tejani MA, Cho JK, Granfortuna J, Coveler AL, Olowokure OO, Baranda JC, Cusnir M, Phillip P, Boles J, Nazemzadeh R, Rarick M, Cohen DJ, Radford J, Fehrenbacher L, Bajaj R, Bathini V, Fanta P, Berlin J, McRee AJ, Maguire R, Wilhelm F, Maniar M, Jimeno A, Gomes CL, Messersmith WA. A phase II/III randomized study to compare the efficacy and safety of rigosertib plus gemcitabine versus gemcitabine alone in patients with previously untreated metastatic pancreatic cancer. Ann Oncol 2016; 27:1180. [PMID: 26945010 DOI: 10.1093/annonc/mdw095] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bardia A, Diamond JR, Mayer IA, Starodub AN, Moroose RL, Isakoff SJ, Ocean AJ, Guarino MJ, Berlin JD, Messersmith WA, Thomas SS, O'Shaughnessy JA, Kalinsky K, Maurer M, Chang JC, Forero A, Traina T, Gucalp A, Wilhelm F, Wegener WA, Maliakal P, Sharkey RM, Goldenberg DM, Vahdat LT. Abstract PD3-06: Safety and efficacy of anti-Trop-2 antibody drug conjugate, sacituzumab govitecan (IMMU-132), in heavily pretreated patients with TNBC. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-pd3-06] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Triple-negative breast cancer (TNBC) comprises about 15% of all breast cancer types, and has a particularly aggressive course. Following first-line therapy, the median PFS is <3 months, and OS is <10 months. Therefore, new treatment strategies are needed. Since Trop-2 is expressed in >90% of TNBC, as measured by IHC, we conducted a trial to evaluate the safety and efficacy of a humanized anti-Trop-2 monoclonal antibody conjugated to a high concentration of SN-38, a camptothecin that is a topoisomerase I inhibitor and the active metabolite of the prodrug irinotecan, with 2-3 logs higher potency than the prodrug.
Methods: After establishing the optimal repeated dose in a Phase I trial (ClinicalTrials.gov, NCT01631552) involving many different solid cancer types, an expanded Phase II was undertaken in a number of cancers, including TNBC. Patients received 8 or 10 mg/kg IMMU-132 i.v. on days 1 and 8 of 21-day repeated cycles. Assessments of safety and response by RECIST1.1 were made weekly and bimonthly, respectively. Tumor biopsies (archival, at baseline prior to treatment, and at disease progression) were obtained when safe and feasible.
Results: As of May 10, 2015, 58 patients with TNBC, with a median of 4 prior therapies (range, 1-11), were treated with IMMU-132. Grade 3-4 toxicities included neutropenia (26%), febrile neutropenia (2%), diarrhea (2%), anemia (4%), and fatigue (4%). No patient developed antibodies to SN-38 or the antibody, and no patient discontinued therapy due to toxicity. Tumor responses were defined as ORR (CR+PR) in 31% of 49 evaluated patients, including 2 with CR, and a clinical benefit ratio (CR+PR+SD>6 mo) of 49% (63% with SD>4 mo; 23 patients continuing treatment after 1st assessment). The current median progression-free survival is 7.3 months with 44% maturity in 50 patients treated at the 8 or 10 mg/kg dose level. Overall survival data are still not mature 20 months after enrollment of first patient. Clinical efficacy correlated to biomarker studies, including Trop-2 expression (target of antibody), topoisomerase-1 expression (target of SN-38), and homologous recombinant deficiency (HRD) assay (marker of DNA repair), is being studied. Immunohistochemistry results in archival specimens currently show 97% positivity of Trop-2 among 34 specimens evaluated, with 79% having high intensity (2+/3+) staining.
Conclusions: The Trop-2-targeting IMMU-132, delivering cytotoxic doses of the topoisomerase I inhibitor, SN-38, shows manageable toxicity, and encouraging anti-tumor activity in relapsed/refractory patients with TNBC. This ADC appears to have a high therapeutic index in heavily pretreated patients.
Citation Format: Bardia A, Diamond JR, Mayer IA, Starodub AN, Moroose RL, Isakoff SJ, Ocean AJ, Guarino MJ, Berlin JD, Messersmith WA, Thomas SS, O'Shaughnessy JA, Kalinsky K, Maurer M, Chang JC, Forero A, Traina T, Gucalp A, Wilhelm F, Wegener WA, Maliakal P, Sharkey RM, Goldenberg DM, Vahdat LT. Safety and efficacy of anti-Trop-2 antibody drug conjugate, sacituzumab govitecan (IMMU-132), in heavily pretreated patients with TNBC. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr PD3-06.
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Affiliation(s)
- A Bardia
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - JR Diamond
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - IA Mayer
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - AN Starodub
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - RL Moroose
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - SJ Isakoff
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - AJ Ocean
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - MJ Guarino
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - JD Berlin
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - WA Messersmith
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - SS Thomas
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - JA O'Shaughnessy
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - K Kalinsky
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - M Maurer
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - JC Chang
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - A Forero
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - T Traina
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - A Gucalp
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - F Wilhelm
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - WA Wegener
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - P Maliakal
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - RM Sharkey
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - DM Goldenberg
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
| | - LT Vahdat
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; University of Colorado Cancer Center, Aurora, CO; Vanderbilt-Ingram Cancer Center, Nashville, TN; Indiana University Health Center for Cancer Care, Goshen, IN; University of Florida Health Cancer Center, Orlando, FL; Weill Cornell Medical College, NY, NY; Helen F. Graham Cancer Center & Research Institute, Newark, DE; Baylor Sammons Cancer Center, Texas Oncology, Dallas, TX; Columbia University Medical Center, NY, NY; Houston Methodist Cancer Center, Houston, TX; University of Alabama Medical Center at Birmingham, Birmingham, AL; Memorial Sloan Kettering Cancer Center, NY, NY; Immunomedics, Inc., Morris Plains, NJ
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Henne B, Ney V, Ollefs K, Wilhelm F, Rogalev A, Ney A. Magnetic interactions in the Zn-Co-O system: tuning local structure, valence and carrier type from extremely Co doped ZnO to ZnCo2O4. Sci Rep 2015; 5:16863. [PMID: 26578268 PMCID: PMC4649617 DOI: 10.1038/srep16863] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/21/2015] [Indexed: 11/09/2022] Open
Abstract
We have investigated the relation between local structure, valence and carrier type with magnetism in the Zn-Co-O system. Thin films ranging from wurtzite Zn(1-x)Co(x)O (Co:ZnO) to ZnCo2O4 spinel were grown on c-sapphire substrates. On the one hand, the unprecedented doping of x = 0.6 Co in ZnO enables to study the structural and magnetic properties well-above the coalescence limit. On the other hand, the ZnCo2O4 spinel provides a p-type environment. We find a strong correlation between local structure, valence and carrier type throughout the Zn-Co-O system. In contrast to earlier publications neither 60% Co:ZnO nor ZnCo2O4 exhibit any sign of ferromagnetic order despite of the high concentration of magnetic ions and a p-type carrier background. Instead, antiferromagnetic exchange is found to be the predominant magnetic interaction in the Zn-Co-O system.
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Affiliation(s)
- Bastian Henne
- Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, Altenberger Str. 69, 4040 Linz, Austria
| | - Verena Ney
- Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, Altenberger Str. 69, 4040 Linz, Austria
| | - Katharina Ollefs
- ESRF-The European Synchrotron CS40220, 38043 Grenoble Cedex 9, France
| | - Fabrice Wilhelm
- ESRF-The European Synchrotron CS40220, 38043 Grenoble Cedex 9, France
| | - Andrei Rogalev
- ESRF-The European Synchrotron CS40220, 38043 Grenoble Cedex 9, France
| | - Andreas Ney
- Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, Altenberger Str. 69, 4040 Linz, Austria
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O'Neil BH, Scott AJ, Ma WW, Cohen SJ, Leichman L, Aisner DL, Menter AR, Tejani MA, Cho JK, Granfortuna J, Coveler L, Olowokure OO, Baranda JC, Cusnir M, Phillip P, Boles J, Nazemzadeh R, Rarick M, Cohen DJ, Radford J, Fehrenbacher L, Bajaj R, Bathini V, Fanta P, Berlin J, McRee AJ, Maguire R, Wilhelm F, Maniar M, Jimeno A, Gomes CL, Messersmith WA. A phase II/III randomized study to compare the efficacy and safety of rigosertib plus gemcitabine versus gemcitabine alone in patients with previously untreated metastatic pancreatic cancer. Ann Oncol 2015; 26:2505. [PMID: 26489442 DOI: 10.1093/annonc/mdv477] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B H O'Neil
- Simon Cancer Center, Indiana University School of Medicine, Indianapolis
| | - A J Scott
- University of Colorado, Denver, Aurora
| | - W W Ma
- Roswell Park Cancer Institute, Buffalo
| | - S J Cohen
- Fox Chase Cancer Center, Philadelphia
| | | | | | | | - M A Tejani
- University of Rochester Medical Center, Rochester
| | | | | | | | - O O Olowokure
- University of Cincinnati Cancer Institute, Cincinnati
| | - J C Baranda
- University of Kansas Medical Center, Westwood
| | - M Cusnir
- Mount Sinai Medical Center, Miami Beach
| | | | - J Boles
- Rex Cancer Center UNC Healthcare, Raleigh
| | | | - M Rarick
- Kaiser Permanante Northwest, Portland
| | - D J Cohen
- NYU Clinical Cancer Center, New York
| | - J Radford
- Hendersonville Hematology and Oncology at Pardee, Hendersonville
| | | | - R Bajaj
- McLeod Regional Medical Center, Florence
| | - V Bathini
- University of Massachusetts Memorial, Worcester
| | - P Fanta
- UCSD Moores Cancer Center, La Jolla
| | - J Berlin
- Vanderbilt-Ingram Cancer Center, Nashville
| | - A J McRee
- UNC Lineberger Comprehensive Cancer Center, Chapel Hill
| | | | | | - M Maniar
- Onconova Therapeutics Inc., Newtown
| | - A Jimeno
- University of Colorado, Denver, Aurora
| | - C L Gomes
- Oncology Consortia of Criterium Inc., Saratoga Springs, USA
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O'Neil BH, Scott AJ, Ma WW, Cohen SJ, Aisner DL, Menter AR, Tejani MA, Cho JK, Granfortuna J, Coveler L, Olowokure OO, Baranda JC, Cusnir M, Phillip P, Boles J, Nazemzadeh R, Rarick M, Cohen DJ, Radford J, Fehrenbacher L, Bajaj R, Bathini V, Fanta P, Berlin J, McRee AJ, Maguire R, Wilhelm F, Maniar M, Jimeno A, Gomes CL, Messersmith WA. A phase II/III randomized study to compare the efficacy and safety of rigosertib plus gemcitabine versus gemcitabine alone in patients with previously untreated metastatic pancreatic cancer. Ann Oncol 2015; 26:1923-1929. [PMID: 26091808 PMCID: PMC4551155 DOI: 10.1093/annonc/mdv264] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 05/13/2015] [Accepted: 05/26/2015] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Rigosertib (ON 01910.Na), a first-in-class Ras mimetic and small-molecule inhibitor of multiple signaling pathways including polo-like kinase 1 (PLK1) and phosphoinositide 3-kinase (PI3K), has shown efficacy in preclinical pancreatic cancer models. In this study, rigosertib was assessed in combination with gemcitabine in patients with treatment-naïve metastatic pancreatic adenocarcinoma. MATERIALS AND METHODS Patients with metastatic pancreatic adenocarcinoma were randomized in a 2:1 fashion to gemcitabine 1000 mg/m(2) weekly for 3 weeks of a 4-week cycle plus rigosertib 1800 mg/m(2) via 2-h continuous IV infusions given twice weekly for 3 weeks of a 4-week cycle (RIG + GEM) versus gemcitabine 1000 mg/m(2) weekly for 3 weeks in a 4-week cycle (GEM). RESULTS A total of 160 patients were enrolled globally and randomly assigned to RIG + GEM (106 patients) or GEM (54). The most common grade 3 or higher adverse events were neutropenia (8% in the RIG + GEM group versus 6% in the GEM group), hyponatremia (17% versus 4%), and anemia (8% versus 4%). The median overall survival was 6.1 months for RIG + GEM versus 6.4 months for GEM [hazard ratio (HR), 1.24; 95% confidence interval (CI) 0.85-1.81]. The median progression-free survival was 3.4 months for both groups (HR = 0.96; 95% CI 0.68-1.36). The partial response rate was 19% versus 13% for RIG + GEM versus GEM, respectively. Of 64 tumor samples sent for molecular analysis, 47 were adequate for multiplex genetic testing and 41 were positive for mutations. The majority of cases had KRAS gene mutations (40 cases). Other mutations detected included TP53 (13 cases) and PIK3CA (1 case). No correlation between mutational status and efficacy was detected. CONCLUSIONS The combination of RIG + GEM failed to demonstrate an improvement in survival or response compared with GEM in patients with metastatic pancreatic adenocarcinoma. Rigosertib showed a similar safety profile to that seen in previous trials using the IV formulation.
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Affiliation(s)
- B H O'Neil
- Simon Cancer Center, Indiana University School of Medicine, Indianapolis
| | - A J Scott
- University of Colorado, Denver, Aurora
| | - W W Ma
- Roswell Park Cancer Institute, Buffalo
| | - S J Cohen
- Fox Chase Cancer Center, Philadelphia
| | | | | | - M A Tejani
- University of Rochester Medical Center, Rochester
| | | | | | | | - O O Olowokure
- University of Cincinnati Cancer Institute, Cincinnati
| | - J C Baranda
- University of Kansas Medical Center, Westwood
| | - M Cusnir
- Mount Sinai Medical Center, Miami Beach
| | | | - J Boles
- Rex Cancer Center UNC Healthcare, Raleigh
| | | | - M Rarick
- Kaiser Permanante Northwest, Portland
| | - D J Cohen
- NYU Clinical Cancer Center, New York
| | - J Radford
- Hendersonville Hematology and Oncology at Pardee, Hendersonville
| | | | - R Bajaj
- McLeod Regional Medical Center, Florence
| | - V Bathini
- University of Massachusetts Memorial, Worcester
| | - P Fanta
- UCSD Moores Cancer Center, La Jolla
| | - J Berlin
- Vanderbilt-Ingram Cancer Center, Nashville
| | - A J McRee
- UNC Lineberger Comprehensive Cancer Center, Chapel Hill
| | | | | | - M Maniar
- Onconova Therapeutics Inc., Newtown
| | - A Jimeno
- University of Colorado, Denver, Aurora
| | - C L Gomes
- Oncology Consortia of Criterium Inc., Saratoga Springs, USA
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Ocean A, Starodub A, Messersmith W, Picozzi V, Guarino M, Thomas S, Bardia A, Shah M, Govindan S, Maliakal P, Wegener W, Sharkey R, Wilhelm F, Goldenberg D. P-162 Interim Results of IMMU-132 (Sacituzumab Govitecan), an Anti-Trop-2 Antibody-Drug Conjugate (ADC), in Patients (pts) with Metastatic Gastrointestinal (GI) Cancers. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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49
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Mazalski P, Sveklo I, Kurant Z, Ollefs K, Rogalev A, Wilhelm F, Fassbender J, Baczewski LT, Wawro A, Maziewski A. XAS and XMCD studies of magnetic properties modifications of Pt/Co/Au and Pt/Co/Pt trilayers induced by Ga⁺ ions irradiation. J Synchrotron Radiat 2015; 22:753-759. [PMID: 25931093 DOI: 10.1107/s1600577515002933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 02/11/2015] [Indexed: 06/04/2023]
Abstract
Magnetic and magneto-optical properties of Pt/Co/Au and Pt/Co/Pt trilayers subjected to 30 keV Ga(+) ion irradiation are compared. In two-dimensional maps of these properties as a function of cobalt thickness and ion fluence, two branches with perpendicular magnetic anisotropy (PMA) for Pt/Co/Pt trilayers are well distinguished. The replacement of the Pt capping layer with Au results in the two branches still being visible but the in-plane anisotropy for the low-fluence branch is suppressed whereas the high-fluence branch displays PMA. The X-ray absorption spectra and X-ray magnetic circular dichroism (XMCD) spectra are discussed and compared with non-irradiated reference samples. The changes of their shapes and peak amplitude, particularly for the high-fluence branch, are related to the modifications of the local environment of Co(Pt) atoms and the etching effects induced by ion irradiation. Additionally, in irradiated trilayers the XMCD measurements at the Pt L2,3-edge reveal an increase of the magnetic moment induced in Pt atoms.
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Affiliation(s)
- Piotr Mazalski
- Faculty of Physics, University of Białystok, Ciołkowskiego 1L, Bialystok 15-245, Poland
| | - Iosif Sveklo
- Faculty of Physics, University of Białystok, Ciołkowskiego 1L, Bialystok 15-245, Poland
| | - Zbigniew Kurant
- Faculty of Physics, University of Białystok, Ciołkowskiego 1L, Bialystok 15-245, Poland
| | - Katharina Ollefs
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
| | - Juergen Fassbender
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, PO Box 510119, Dresden 01314, Germany
| | - Lech Tomasz Baczewski
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warszawa 02-668, Poland
| | - Andrzej Wawro
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warszawa 02-668, Poland
| | - Andrzej Maziewski
- Faculty of Physics, University of Białystok, Ciołkowskiego 1L, Bialystok 15-245, Poland
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Ramos SM, Hering EN, Lapertot G, Wilhelm F, Rogalev A, Baudelet F, Braithwaite D. XMCD measurements under pressure confirm ferromagnetism in YbCu2Si2but find none in YbRh2Si2. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1742-6596/592/1/012015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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