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Geers M, Gill TB, Burnett AD, Bassey EN, Fabelo O, Cañadillas-Delgado L, Cliffe MJ. Magnetic structure and properties of the honeycomb antiferromagnet [Na(OH 2) 3]Mn(NCS) 3. Phys Chem Chem Phys 2024; 26:15844-15849. [PMID: 38779829 DOI: 10.1039/d4cp01265h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
We report the magnetic structure and properties of a thiocyanate-based honeycomb magnet [Na(OH2)3]Mn(NCS)3 which crystallises in the unusual low-symmetry trigonal space group P3̄. Magnetic measurements on powder samples show this material is an antiferromagnet (ordering temperature TN,mag = 18.1(6) K) and can be described by nearest neighbour antiferromagnetic interactions J = -11.07(4) K. A method for growing neutron-diffraction sized single crystals (>10 mm3) is demonstrated. Low temperature neutron single crystal diffraction shows that the compound adopts the collinear antiferromagnetic structure with TN,neut = 18.94(7) K, magnetic space group P3̄'. Low temperature second-harmonic generation (SHG) measurements provide no evidence of breaking of the centre of symmetry.
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Affiliation(s)
- Madeleine Geers
- School of Chemistry, University Park, Nottingham, NG7 2RD, UK.
- Institut Laue Langevin, 71 avenue des Martyrs CS 20156, 38042 Grenoble Cedex 9, France
| | - Thomas B Gill
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | | | - Euan N Bassey
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Oscar Fabelo
- Institut Laue Langevin, 71 avenue des Martyrs CS 20156, 38042 Grenoble Cedex 9, France
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2
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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.
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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
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3
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Ivko S, Tustain K, Dolling T, Abdeldaim A, Mustonen OHJ, Manuel P, Wang C, Luetkens H, Clark L. Uncovering the Kagome Ferromagnet within a Family of Metal-Organic Frameworks. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:5409-5421. [PMID: 36160701 PMCID: PMC9490827 DOI: 10.1021/acs.chemmater.2c00289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 05/19/2022] [Indexed: 06/16/2023]
Abstract
Kagome networks of ferromagnetically or antiferromagnetically coupled magnetic moments represent important models in the pursuit of a diverse array of novel quantum and topological states of matter. Here, we explore a family of Cu2+-containing metal-organic frameworks (MOFs) bearing kagome layers pillared by ditopic organic linkers with the general formula Cu3(CO3)2(x)3·2ClO4 (MOF-x), where x is 1,2-bis(4-pyridyl)ethane (bpe), 1,2-bis(4-pyridyl)ethylene (bpy), or 4,4'-azopyridine (azpy). Despite more than a decade of investigation, the nature of the magnetic exchange interactions in these materials remained unclear, meaning that whether the underlying magnetic model is that of an kagome ferromagnet or antiferromagnet is unknown. Using single-crystal X-ray diffraction, we have developed a chemically intuitive crystal structure for this family of materials. Then, through a combination of magnetic susceptibility, powder neutron diffraction, and muon-spin spectroscopy measurements, we show that the magnetic ground state of this family consists of ferromagnetic kagome layers that are coupled antiferromagnetically via their extended organic pillaring linkers.
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Affiliation(s)
- Samuel
A. Ivko
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Katherine Tustain
- Department
of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool L7 3NY, U.K.
| | - Tristan Dolling
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
| | - Aly Abdeldaim
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
- ISIS
Neutron and Muon Source, Rutherford Appleton
Laboratory, Didcot OX11 0QX, U.K.
| | | | - Pascal Manuel
- ISIS
Neutron and Muon Source, Rutherford Appleton
Laboratory, Didcot OX11 0QX, U.K.
| | - Chennan Wang
- Swiss
Muon Source, Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Hubertus Luetkens
- Swiss
Muon Source, Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Lucy Clark
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K.
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Cliffe M, Fabelo O, Cañadillas-Delgado L. Magnetic order in a metal thiocyanate perovskite-analogue. CrystEngComm 2022. [DOI: 10.1039/d2ce00649a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal thiocyanate perovskite-analogues are a growing class of materials, but although they contain paramagnetic cations there have been no reports of their magnetic properties. Due to the large separations between...
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Liu X, Zhou J, Huang L, Xiao HP, Amarante TR, Almeida Paz FA, Xiang B, Fu L. A Copper(I)-Thioarsenate(III) Inorganic Framework Directed by [Ni(en) 3] 2. Inorg Chem 2021; 60:6813-6819. [PMID: 33886310 DOI: 10.1021/acs.inorgchem.1c00703] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One novel three-dimensional (3-D) copper(I)-thioarsenate(III) [Ni(en)3]Cu4As4S9 (1, en = ethylenediamine) has been solvothermally prepared with the utilization of the in situ formation of [Ni(en)3]2+ complex as structure-directing agent (SDA). 1 contains cubane-like [Cu8S12]16- clusters and rare tetrameric [As4S9]6- units, which are interconnected to generate the first example of a 3-D anionic framework [Cu4As4S9]n2n-, topologically identical to pyrite, and having large channels filled by [Ni(en)3]2+ complex cations. 1 is a potential wide-band-gap semiconductor with an energy gap of 1.91 eV that exhibits selectively photocatalytic degradation of methylene blue under visible-light irradiation. The density functional theory calculation, photocurrent response, and magnetic properties of 1 were also investigated.
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Affiliation(s)
- Xing Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, People's Republic of China.,Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing 401331, People's Republic of China
| | - Jian Zhou
- Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing 401331, People's Republic of China
| | - Li Huang
- Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing 401331, People's Republic of China
| | - Hong-Ping Xiao
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, People's Republic of China
| | - Tatiana R Amarante
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Filipe A Almeida Paz
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bin Xiang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, People's Republic of China
| | - Lianshe Fu
- Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
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Fabrykiewicz P, Przeniosło R, Sosnowska I. Crystal symmetry for incommensurate helical and cycloidal modulations. Acta Crystallogr A Found Adv 2021; 77:160-172. [PMID: 33646202 DOI: 10.1107/s205327332100111x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 01/31/2021] [Indexed: 11/10/2022] Open
Abstract
A classification of magnetic superspace groups compatible with the helical and cycloidal magnetic modulations is presented. Helical modulations are compatible with groups from crystal classes 1, 2, 222, 4, 422, 3, 32, 6 and 622, while cycloidal modulations are compatible with groups from crystal classes 1, 2, m and mm2. For each magnetic crystal class, the directions of the symmetry-allowed (non-modulated) net ferromagnetic moment and electric polarization are given. The proposed classification of superspace groups is tested on experimental studies of type-II multiferroics published in the literature.
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Affiliation(s)
- Piotr Fabrykiewicz
- Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | | | - Izabela Sosnowska
- Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
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