1
|
N'Diaye A, Bordage A, Nataf L, Baudelet F, Rivière E, Bleuzen A. Interplay between transition-metal K-edge XMCD, slight structural distortions and magnetism in a series of trimetallic (Co xNi (1-x)) 4[Fe(CN) 6] 3/8 Prussian blue analogues. Phys Chem Chem Phys 2024; 26:15576-15586. [PMID: 38757724 DOI: 10.1039/d3cp04749k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
The magnetic properties of a series of trimetallic (Co,Ni)Fe Prussian blue analogues (PBAs) were investigated by SQUID magnetometry and X-ray magnetic circular dichroism (XMCD) at the three transition metal (TM) K-edges. In turn, the PBA trimetallic series was used as a tool in order to better understand the information contained in TM K-edge XMCD and particularly the chemical nature of the probed species (extended sub-lattice or localized entities). The results show that the magnetic behavior of the compounds is dictated by competing exchange interactions between the Co-Fe and Ni-Fe pairs, without spin frustration. They also show that XMCD at the TM K-edge is a local atomic probe of the element at the N side of the cyanide bridge and a local probe of the absorbing atom and its first magnetic neighbors on the C side of the bridge. At last, XMCD at the TM K-edge turns out to be highly sensitive to very small structural distortions.
Collapse
Affiliation(s)
- Adama N'Diaye
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France.
| | - Amélie Bordage
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France.
| | - Lucie Nataf
- Synchrotron SOLEIL, L'Orme des Merisiers, St Aubin, BP 48, 91192 Gif sur Yvette, France
| | - François Baudelet
- Synchrotron SOLEIL, L'Orme des Merisiers, St Aubin, BP 48, 91192 Gif sur Yvette, France
| | - Eric Rivière
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France.
| | - Anne Bleuzen
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France.
| |
Collapse
|
2
|
Pato-Doldán B, Cañadillas-Delgado L, Gómez-Aguirre LC, Señarís-Rodríguez MA, Sánchez-Andújar M, Fabelo Ó, Mira J. Atypical Magnetic Behavior in the Incommensurate (CH 3NH 3)[Ni(HCOO) 3] Hybrid Perovskite. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:3330-3338. [PMID: 36846095 PMCID: PMC9942519 DOI: 10.1021/acs.jpcc.2c08364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/10/2023] [Indexed: 06/18/2023]
Abstract
A plethora of temperature-induced phase transitions have been observed in (CH3NH3)[M(HCOO)3] compounds, where M is Co(II) or Ni(II). Among them, the nickel compound exhibits a combination of magnetic and nuclear incommensurability below Néel temperature. Despite the fact that the zero-field behavior has been previously addressed, here we study in depth the macroscopic magnetic behavior of this compound to unveil the origin of the atypical magnetic response found in it and in its parent family of formate perovskites. In particular, they show a puzzling magnetization reversal in the curves measured starting from low temperatures, after cooling under zero field. The first atypical phenomenon is the impossibility of reaching zero magnetization, even by nullifying the applied external field and even compensating it for the influence of the Earth's magnetic field. Relatively large magnetic fields are needed to switch the magnetization from negative to positive values or vice versa, which is compatible with a soft ferromagnetic system. The atypical path found in its first magnetization curve and hysteresis loop at low temperatures is the most noticeable feature. The magnetization curve switches from more than 1200 Oe from the first magnetization loop to the subsequent magnetization loops. A feature that cannot be explained using a model based on unbalanced pair of domains. As a result, we decipher this behavior in light of the incommensurate structure of this material. We propose, in particular, that the applied magnetic field induces a magnetic phase transition from a magnetically incommensurate structure to a magnetically modulated collinear structure.
Collapse
Affiliation(s)
- Breogán Pato-Doldán
- Department
of Chemistry, Faculty of Sciences, Universidade
da Coruña, 15071 A Coruña, Spain
| | | | | | | | - Manuel Sánchez-Andújar
- Department
of Chemistry, Faculty of Sciences, Universidade
da Coruña, 15071 A Coruña, Spain
| | - Óscar Fabelo
- Institut
Laue-Langevin, 6 Rue Jules Horowitz, BP 156, 38042 Grenoble, Cedex 9, France
- Departamento
de Física, Universidad de La Laguna, Avenida Astrofísico Francisco
Sánchez s/n, 38200 La Laguna, Tenerife, Spain
| | - Jorge Mira
- Departamento
de Física Aplicada and iMATUS, Universidade
de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| |
Collapse
|
3
|
Deepak M, Kumar A, Yusuf SM, Sampathkumaran EV. Insight into the negative magnetization and anomalous exchange-bias in DyFe5Al7 through neutron depolarization and neutron diffraction studies. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 35:065802. [PMID: 36368049 DOI: 10.1088/1361-648x/aca24d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
We have provided the mesoscopic and microscopic understandings of polarity reversal of the magnetization or negative magnetization (NM) below TCOMP = 93 K in an exotic magnetic material containing three magnetic sublattices, viz., DyFe5Al7 crystallizing in ThMn12 structure, using neutron depolarization and neutron diffraction techniques. A full recovery of the neutron beam polarization at the TCOMP in a neutron depolarization experiment reveals a total compensation of magnetization inside the magnetic domains in the sample. The temperature-dependent neutron diffraction study under zero magnetic field has provided temperature dependencies of antiparallelly coupled Dy (MDy(2a)) and Fe (MFe(8f) and MFe(8j)) sublattice magnetic moments along [100] direction.Thedominance of |MDy(2a)| over total Fe moment, MFetotal = 4*|MFe(8f)| + |MFe(8j)|, below TCOMP leads to the NM in the compound. The magnetization versusmagnetic field curves below the TCOMP indicate the presence of field-induced spin reorientation in the compound. The magnetic field required for spin reorientation (HSR) is maximum at the lowest temperature and it decreases to zero as the temperature is increased to TCOMP. Interestingly, the compound shows a finite exchange-bias (HEB) below the TCOMP only, as evident from the field-cooled hysteresis loops, while at T > TCOMP,HEB is almost zero. The cooling-field (HCOOL) dependent study of HEB shows a slope change at HCOOL ~ HSR indicating a correlation of exchange-bias with spin-reorientation in the compound. This study, apart from revealing microscopic understanding of magnetic behavior of an exotic three magnetic sublattice system, provides a correlation among exchange-bias, magnetic compensation, and spin-reorientation phenomena.
Collapse
Affiliation(s)
- Mr Deepak
- Bhabha Atomic Research Centre Solid State Physics Division, SOLID STATE PHYSICS DIVISION, Mumbai, Maharashtra, 400085, INDIA
| | - Amit Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, INDIA
| | - S M Yusuf
- Bhabha Atomic Research Centre, SOILD STATE PHYSICS DIVISION, Mumbai, 400085, INDIA
| | - E V Sampathkumaran
- Homi Bhabha Centre for Science Education, V N Purav Marg, Mankhurd, Mumbai, 400088, INDIA
| |
Collapse
|
4
|
N’Diaye A, Bordage A, Nataf L, Baudelet F, Rivière E, Bleuzen A. Interplay between Transition-Metal K-edge XMCD and Magnetism in Prussian Blue Analogs. ACS OMEGA 2022; 7:36366-36378. [PMID: 36278067 PMCID: PMC9583310 DOI: 10.1021/acsomega.2c04049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 07/25/2022] [Indexed: 06/16/2023]
Abstract
To disentangle the information contained in transition-metal K-edge X-ray magnetic circular dichroism (XMCD), two series of Prussian blue analogs (PBAs) were investigated as model compounds. The number of 3d electrons and the magnetic orbitals have been varied on both sites of the bimetallic cyanide polymer by combining with the hexacyanoferrate or the hexacyanochromate entities' various divalent metal ions A2+ (Mn2+, Fe2+, Co2+, Ni2+, and Cu2+). These PBA were studied by Fe and Cr X-ray absorption spectroscopy and XMCD. The results, compared to those obtained at the A K-edges in a previous work, show that transition-metal K-edge XMCD is very sensitive to orbital symmetry and can therefore give valuable information on the local structure of the magnetic centers. Expressions of the intensity of the main 1s → 4p contribution to the signal are proposed for all K-edges and all compounds. The results pave the way toward a new tool for molecular materials able to give access to valuable information on the local orientation of the magnetic moments or to better understand the role of 4p orbitals involved in their magnetic properties.
Collapse
Affiliation(s)
- Adama N’Diaye
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
CNRS, Université Paris-Saclay, 91405Orsay, France
| | - Amélie Bordage
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
CNRS, Université Paris-Saclay, 91405Orsay, France
| | - Lucie Nataf
- Synchrotron
SOLEIL, L’Orme des Merisiers, St Aubin, BP 48, F-91192Gif sur Yvette, France
| | - François Baudelet
- Synchrotron
SOLEIL, L’Orme des Merisiers, St Aubin, BP 48, F-91192Gif sur Yvette, France
| | - Eric Rivière
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
CNRS, Université Paris-Saclay, 91405Orsay, France
| | - Anne Bleuzen
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
CNRS, Université Paris-Saclay, 91405Orsay, France
| |
Collapse
|
5
|
N'Diaye A, Bordage A, Nataf L, Baudelet F, Rivière E, Bleuzen A. Toward Quantitative Magnetic Information from Transition Metal K-Edge XMCD of Prussian Blue Analogs. Inorg Chem 2022; 61:6326-6336. [PMID: 35414167 DOI: 10.1021/acs.inorgchem.2c00637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two series of Prussian blue analogs (PBA) were used as model compounds in order to disentangle the information contained in X-ray magnetic circular dichroism (XMCD) at the K-edges of transition metals. The number of 3d electrons on one site of the bimetallic cyanide polymer has been varied by associating to the [Fe(CN)6]3- or the [Cr(CN)6]3- precursors various divalent metal ions A2+ (Mn2+, Fe2+, Co2+, Ni2+, and Cu2+). The compounds were studied by X-ray diffraction and SQUID magnetometry, as well as by X-ray absorption spectroscopy and XMCD at the K-edges of the A2+ transition metal ion. The study shows that the 1s → 4p contribution to the A K-edge XMCD signal can be related to the electronic structure and the magnetic behavior of the probed A2+ ion: the shape of the signal to the filling of the 3d orbitals, the sign of the signal to the direction of the magnetic moment with respect to the applied magnetic field, the intensity of the signal to the total spin number SA, and the area under curve to the Curie constant CA. The whole study hence demonstrates that PBAs are particularly well-adapted for understanding the information contained in the transition metals K-edge XMCD signals. It also offers new perspectives toward the full disentangling of the information contained in these signals and access to new insights into materials magnetic properties.
Collapse
Affiliation(s)
- Adama N'Diaye
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS, Université Paris-Saclay, 91405 Orsay, France
| | - Amélie Bordage
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS, Université Paris-Saclay, 91405 Orsay, France
| | - Lucie Nataf
- Synchrotron SOLEIL, L'Orme des Merisiers, St. Aubin, BP 48, F-91192 Gif sur Yvette, France
| | - François Baudelet
- Synchrotron SOLEIL, L'Orme des Merisiers, St. Aubin, BP 48, F-91192 Gif sur Yvette, France
| | - Eric Rivière
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS, Université Paris-Saclay, 91405 Orsay, France
| | - Anne Bleuzen
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS, Université Paris-Saclay, 91405 Orsay, France
| |
Collapse
|
6
|
Thermal-induced structural distortion, charge transfer and magnetic changes of Prussian blue analogs K0.4Co1.3[Fe(CN)6]•nH2O. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
7
|
Cliffe MJ, Keyzer EN, Bond AD, Astle MA, Grey CP. The structures of ordered defects in thiocyanate analogues of Prussian Blue. Chem Sci 2020; 11:4430-4438. [PMID: 34122899 PMCID: PMC8159453 DOI: 10.1039/d0sc01246g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
We report the structures of six new divalent transition metal hexathiocyanatobismuthate frameworks with the generic formula , M = Mn, Co, Ni and Zn. These frameworks are defective analogues of the perovskite-derived trivalent transition metal hexathiocyanatobismuthates MIII[Bi(SCN)6]. The defects in these new thiocyanate frameworks order and produce complex superstructures due to the low symmetry of the parent structure, in contrast to the related and more well-studied cyanide Prussian Blue analogues. Despite the close similarities in the chemistries of these four transition metal cations, we find that each framework contains a different mechanism for accommodating the lowered transition metal charge, making use of some combination of Bi(SCN)6 3- vacancies, MBi antisite defects, water substitution for thiocyanate, adventitious extra-framework cations and reduced metal coordination number. These materials provide an unusually clear view of defects in molecular framework materials and their variety suggests that similar richness may be waiting to be uncovered in other hybrid perovskite frameworks.
Collapse
Affiliation(s)
- Matthew J Cliffe
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK.,School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Evan N Keyzer
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Andrew D Bond
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Maxwell A Astle
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Clare P Grey
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| |
Collapse
|
8
|
Xia Y, Liu M, Li D. Hydrostatic pressure induced transformation of magnetism in a trimetallic CuMnFe Prussian blue analogue. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1572121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Yanfang Xia
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
- College of Nuclear Science and Technology, University of South China, Hengyang, China
| | - Min Liu
- College of Nuclear Science and Technology, University of South China, Hengyang, China
| | - Duxin Li
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
| |
Collapse
|
9
|
Bhatt P, Kolanji K, Ivanova A, Yogi A, Jakob G, Mukadam MD, Yusuf SM, Baumgarten M. Magnetic Exchange Interaction in Nitronyl Nitroxide Radical-Based Single Crystals of 3d Metal Complexes: A Combined Experimental and Theoretical Study. ACS OMEGA 2018; 3:2918-2933. [PMID: 31458563 PMCID: PMC6641457 DOI: 10.1021/acsomega.7b01669] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/22/2018] [Indexed: 06/10/2023]
Abstract
Two stable nitronyl nitroxide free radicals {R 1 = 4'-methoxy-phenyl-4,4,5,5,-tetramethylimidazoline-1-oxyl-3-oxide (NNPhOMe) and R 2 = 2-(2'-thienyl)-4,4,5,5-tetramethylimidazoline 3-oxide 1-oxyl (NNT)} are successfully synthesized using Ullmann condensation. The reactions of these two radicals with 3d transition metal ions, in the form of M(hfac)2 (where M = Co or Mn, hfac: hexafluoroacetylacetone), result in four metal-organic complexes Co(hfac)2(NNPhOMe)2, 1; Co(hfac)2(NNT)2·(H2O), 2; Mn(hfac)2(NNPhOMe)·x(C7H16), 3; and Mn(hfac)2(NNT)2, 4. The crystal structure and magnetic properties of these complexes are investigated by single-crystal X-ray diffraction, dc magnetization, infrared, and electron paramagnetic resonance spectroscopies. The compounds 1 and 4 crystallize in the triclinic, P1̅, space group, whereas complex 3 crystallizes in the monoclinic structure with the C2/c space group and forms chain-like structure along the c direction. The complex 2 crystallizes in the monoclinic symmetry with the P21/c space group in which the N-O unit of the radical coordinates with the Co ion through hydrogen bonding of a water molecule. All compounds exhibit antiferromagnetic interactions between the transition metal ions and nitronyl nitroxide radicals. The magnetic exchange interactions (J/K B) are derived using isotropic spin Hamiltonian H = -2J∑(S metal S radical) for the model fitting to the magnetic susceptibility data for 1, 2, 3, and 4. The exchange interaction strengths are found to be -328, -1.25, -248, and -256 K, for the 1, 2, 3, and 4 metal-organic complexes, respectively. Quantum chemical density functional theory (DFT) computations are carried out on several models of the metal-radical complexes to elucidate the magnetic interactions at the molecular level. The calculations show that a small part of the inorganic spins are delocalized over the oxygens from hfac {∼0.03 for Co(II) and ∼0.015 for Mn(II)}, whereas a more significant fraction {∼0.24 for Mn(II) and ∼0.13 for Co(II)} of delocalized spins from the metal ion is transferred to the coordinated oxygen atom(s) of nitronyl nitroxide.
Collapse
Affiliation(s)
- Pramod Bhatt
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400 085, India
| | - Kubandiran Kolanji
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Anela Ivanova
- University
of Sofia, Faculty of Chemistry and Pharmacy, 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Arvind Yogi
- Tata
Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Gerhard Jakob
- Institute
of Physics, University of Mainz, Staudinger Weg 7, 55128 Mainz, Germany
| | - Mayuresh D. Mukadam
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400 085, India
| | - Seikh Mohammad Yusuf
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400 085, India
- Homi
Bhabha
National Institute, Anushaktinagar, Mumbai 400 094, India
| | - Martin Baumgarten
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| |
Collapse
|
10
|
Xie X, Che H, Wang H, Lin G, Zhu H. Negative Zero-Field-Cooled Magnetization in YMn 0.5Cr 0.5O 3 due to Giant Coercivity and Trapped Field. Inorg Chem 2018; 57:175-180. [PMID: 29232122 DOI: 10.1021/acs.inorgchem.7b02365] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report an intensive study on negative magnetization under zero-field-cooled (ZFC) mode in YMn0.5Cr0.5O3 polycrystalline samples. It has been found that the magnetization reversal in ZFC measurements is strongly related to a giant coercivity of the oxide. The giant coercivity may result from the cooperative effect of magnetocrystalline anisotropy and the Dzyaloshinsky-Moriya interaction, especially at temperatures below 10 K. By fitting the high-temperature paramagnetic data under nominal zero field, the value of the trapped field in a superconducting magnet has been derived to be around several Oe, which further demonstrates that the negative ZFC magnetization is an artifact caused by negative trapped field in combination with the giant coercivity. Consequently, we suggest that one has to be cautious of trapped field in superconducting magnets in understanding negative ZFC magnetization, especially in "hard" magnetic samples.
Collapse
Affiliation(s)
- Xiangnan Xie
- Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.,Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences , No. 96 Jinzhai Road, Hefei, Anhui 230026, People's Republic of China
| | - Hailiang Che
- Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
| | - Haoru Wang
- Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.,Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences , No. 96 Jinzhai Road, Hefei, Anhui 230026, People's Republic of China
| | - Guankai Lin
- Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.,Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences , No. 96 Jinzhai Road, Hefei, Anhui 230026, People's Republic of China
| | - Hong Zhu
- Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.,Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences , No. 96 Jinzhai Road, Hefei, Anhui 230026, People's Republic of China
| |
Collapse
|
11
|
Xia Y, Liu M, Li D. The Mixed Magnetic Property of Co0.76Cu0.74[Fe(CN)6]·7.5H2O. Aust J Chem 2018. [DOI: 10.1071/ch18290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Co0.76Cu0.74[Fe(CN)6]·7.5H2O was prepared as a powder by a chemical co-precipitation method. The powder X-ray diffraction patterns were indexed to the typical face-centred cubic structure with the lattice parameter a 10.55(2) Å. The temperature dependence of the χ−1 curve obeys the Curie–Weiss law (χ = C/(T – θ)) in the temperature range of 180–300 K. According to Curie–Weiss law, the calculated θ value is −54.82 K. In the paramagnetic state at 300 K, the effective magnetic moment (μeff = (8χT)1/2) is 3.58 μB per formula unit. The calculated theoretical effective magnetic moment is 4.06 μB. The magnetic field cooling measurements under a 200 Oe applied magnetic field show that the saturation magnetization value at 2 K of the complex Co0.76Cu0.74[Fe(CN)6]·7.5H2O is 1.528 emu g−1.
Collapse
|
12
|
Fitta M, Prima-Garcia H, Czaja P, Korzeniak T, Krupiński M, Wojtyniak M, Bałanda M. Magnetic and magneto-optical properties of nickel hexacyanoferrate/chromate thin films. RSC Adv 2017. [DOI: 10.1039/c6ra25775e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We present thin films obtained by “layer by layer” deposition, where Fe/Cr ratio is controlled by the dipping sequence. The goal of our work is the investigation of material properties evolution induced by the change of its chemical composition.
Collapse
Affiliation(s)
- Magdalena Fitta
- Institute of Nuclear Physics Polish Academy of Sciences
- PL-31342 Krakow
- Poland
| | - Helena Prima-Garcia
- Instituto de Ciencia Molecular (ICMol)
- Universitat de València
- 46980-Paterna
- Spain
| | - Paweł Czaja
- Institute of Metallurgy and Materials Science Polish Academy of Sciences
- Kraków
- Poland
| | | | - Michał Krupiński
- Institute of Nuclear Physics Polish Academy of Sciences
- PL-31342 Krakow
- Poland
| | - Marcin Wojtyniak
- Institute of Physics
- University of Silesia
- Katowice
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - Maria Bałanda
- Institute of Nuclear Physics Polish Academy of Sciences
- PL-31342 Krakow
- Poland
| |
Collapse
|
13
|
Billoni OV, Pomiro F, Cannas SA, Martin C, Maignan A, Carbonio RE. Magnetization reversal in mixed ferrite-chromite perovskites with non magnetic cation on the A-site. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:476003. [PMID: 27661565 DOI: 10.1088/0953-8984/28/47/476003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we have performed Monte Carlo simulations in a classical model for RFe1-x Cr x O3 with R = Y and Lu, comparing the numerical simulations with experiments and mean field calculations. In the analyzed compounds, the antisymmetric exchange or Dzyaloshinskii-Moriya (DM) interaction induced a weak ferromagnetism due to a canting of the antiferromagnetically ordered spins. This model is able to reproduce the magnetization reversal (MR) observed experimentally in a field cooling process for intermediate x values and the dependence with x of the critical temperatures. We also analyzed the conditions for the existence of MR in terms of the strength of DM interactions between Fe(3+) and Cr(3+) ions with the x values variations.
Collapse
Affiliation(s)
- Orlando V Billoni
- Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba and Instituto de Física Enrique Gaviola (IFEG-CONICET), Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | | | | | | | | | | |
Collapse
|
14
|
Bhatt P, Banerjee S, Anwar S, Mukadam MD, Meena SS, Yusuf SM. Core-shell Prussian blue analogue molecular magnet Mn(1.5)[Cr(CN)6]·mH2O@Ni(1.5)[Cr(CN)6]·nH2O for hydrogen storage. ACS APPLIED MATERIALS & INTERFACES 2014; 6:17579-17588. [PMID: 25310858 DOI: 10.1021/am503526c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Core-shell Prussian blue analogue molecular magnet Mn1.5[Cr(CN)6]·mH2O@Ni1.5[Cr(CN)6]·nH2O has been synthesized using a core of Mn1.5[Cr(CN)6]·7.5H2O, surrounded by a shell of Ni1.5[Cr(CN)6]·7.5H2O compound. A transmission electron microscopy (TEM) study confirms the core-shell nature of the nanoparticles with an average size of ∼25 nm. The core-shell nanoparticles are investigated by using x-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and elemental mapping, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and infrared (IR) spectroscopy. The Rietveld refinement of the XRD pattern reveals that the core-shell compound has a face-centered cubic crystal structure with space group Fm3m. The observation of characteristic absorption bands in the range of 2000-2300 cm(-1) in IR spectra corresponds to the CN stretching frequency of Mn(II)/Ni(II)-N≡C-Cr(III) sequence, confirming the formation of Prussian blue analogues. Hydrogen absorption isotherm measurements have been used to investigate the kinetics of molecular hydrogen adsorption into core-shell compounds of the Prussian blue analogue at low temperature conditions. Interestingly, the core-shell compound shows an enhancement in the hydrogen capacity (2.0 wt % at 123 K) as compared to bare-core and bare-shell compounds. The hydrogen adsorption capacity has been correlated with the specific surface area and TGA analysis of the core-shell compound. To the best of our knowledge, this is the first report on the hydrogen storage properties of core-shell Prussian blue analogue molecular magnet that could be useful for hydrogen storage applications.
Collapse
Affiliation(s)
- Pramod Bhatt
- Solid State Physics Division and ‡Chemistry Division, Bhabha Atomic Research Centre , Mumbai 400085, India
| | | | | | | | | | | |
Collapse
|
15
|
Kumar A, Peters EC, Burghard M. Self-assembled magnetic nanoparticles of Prussian blue on graphene. RSC Adv 2014. [DOI: 10.1039/c4ra01079e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Non-covalent deposition of Prussian blue on graphene.
Collapse
Affiliation(s)
- Amit Kumar
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
- Max-Plank-Institut für Festkörperforschung
- D-70569 Stuttgart, Germany
| | - Eva C. Peters
- Max-Plank-Institut für Festkörperforschung
- D-70569 Stuttgart, Germany
| | - Marko Burghard
- Max-Plank-Institut für Festkörperforschung
- D-70569 Stuttgart, Germany
| |
Collapse
|
16
|
Bera A, Dey S, Pal AJ. Magnetic moment assisted layer-by-layer film formation of a Prussian Blue analog. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:2159-2165. [PMID: 23347263 DOI: 10.1021/la3036506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We formed magnetic moment assisted layer-by-layer (LbL) films of a Prussian Blue analogue (PB). We applied an external magnetic field to each monolayer of PB to orient the magnetic moment of the compound perpendicular to the substrate. Aligned moments or orientation of the magnetic compounds themselves were immobilized in each monolayer, so that the moments could augment formation of the subsequent monolayers of LbL adsorption process. We hence could form multilayered LbL films of PB molecules with their magnetic moments oriented perpendicular to the substrate. We also formed LbL films of the compound with their moments oriented parallel to the substrate and facing one particular direction. We have measured conductivity and dielectric constant of the two types of films and compared the parameters with that of conventional LbL films deposited without orienting magnetic moments of the molecules.
Collapse
Affiliation(s)
- Abhijit Bera
- Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
| | | | | |
Collapse
|
17
|
Nossol E, Nossol ABS, Zarbin AJG, Bond AM. Carbon nanotube/Prussian blue nanocomposite film as a new electrode material for environmental treatment of water samples. RSC Adv 2013. [DOI: 10.1039/c3ra40397a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
18
|
A coexistence of ferromagnetic and antiferromagnetic exchange interactions in prussian blue analog Cu0.47Ni0.48Mn0.55[Fe(CN)6]·XH2O. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.09.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
19
|
Sharma VK, Mitra S, Kumar A, Yusuf SM, Juranyi F, Mukhopadhyay R. Diffusion of water in molecular magnet Cu(0.75)Mn(0.75)[Fe(CN)6]·7H2O. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:446002. [PMID: 22005137 DOI: 10.1088/0953-8984/23/44/446002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Here we report the dynamical behaviour of water in Prussian blue analogue (PBA) Cu(0.75)Mn(0.75)[Fe(CN)(6)]·7H(2)O molecular magnet in the temperature range 260-360 K as studied using the quasielastic neutron scattering technique. While significant quasielastic broadening is observed in the hydrated sample, no broadening was observed in the dehydrated one. Data analysis showed that the observed quasielastic broadening in Cu(0.75)Mn(0.75)[Fe(CN)(6)]·7H(2)O corresponds to the dynamics of the non-coordinated water molecules at the 32f site and the coordinated water molecules at the 24e site, existing in the cavities created by the absence of Fe(CN)(6) units. The non-coordinated water molecules at 8c interstitial sites do not contribute to the broadening, suggesting that they are immobile at least within the time window of the spectrometer used. Behaviour of the elastic incoherent structure factor is consistent with the model where the water molecules undergo translational diffusion localized within the cavity of 5.1 Å. While all the non-coordinated water molecules at the 32f site are dynamic over the entire range of temperatures, the coordinated ones at the 24e site become progressively dynamic with temperature. The water molecules were found to undergo hindered (~1.16 × 10(-5) cm(2) s(-1) at 300 K) diffusion compared to bulk water and the diffusivity followed Arrhenius behaviour within the measured temperature range with an activation energy of 1.26 kcal mol(-1).
Collapse
Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | | | | | | | | |
Collapse
|
20
|
Young CA, Goodwin AL. Applications of pair distribution function methods to contemporary problems in materials chemistry. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04415f] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
21
|
Jiang N, Li FY, Xu L, Zhao L, Wang YC. [Mn(C4H10ON)(H2O)][Fe(CN)6]: A Three-Dimensional Cyanide-Bridged Ferrimagnet with a Morpholine Ligand. Inorg Chem 2010; 50:1544-50. [DOI: 10.1021/ic102145s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ning Jiang
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Feng-Yan Li
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Lin Xu
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Li−Li Zhao
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Yu-Chao Wang
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| |
Collapse
|
22
|
Thakur N, Yusuf SM, Yakhmi JV. Structural disorder in alkaline earth metal doped BaxMn[Fe(CN)6]2(x+1)/3·zH2O molecular magnets: a reverse Monte Carlo study. Phys Chem Chem Phys 2010; 12:12208-16. [DOI: 10.1039/c0cp00008f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|