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Magnetic ground state of the one-dimensional ferromagnetic chain compounds M(NCS)2(thiourea)2 (M=Ni,Co)
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Curley, Samuel P. M., Scatena, R., Williams, Robert C., Goddard, Paul, Macchi, P., Hicken, T. J., Lancaster, T., Xiao, F., Blundell, S. J., Zapf, V., Eckert, J. C., Krenkel, E. H., Villa, J. A., Rhodehouse, M. L. and Manson, J. L. (2021) Magnetic ground state of the one-dimensional ferromagnetic chain compounds M(NCS)2(thiourea)2 (M=Ni,Co). Physical Review Materials, 5 (3). 034401 . doi:10.1103/PhysRevMaterials.5.034401 ISSN 2475-9953.
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WRAP-Magnetic-ground-state-one-dimensional-ferromagnetic-chain-2021.pdf - Accepted Version - Requires a PDF viewer. Download (3726Kb) | Preview |
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Official URL: https://doi.org/10.1103/PhysRevMaterials.5.034401
Abstract
The magnetic properties of the two isostructural molecule-based magnets—Ni(NCS)2(thiourea)2, S=1 [thiourea=SC(NH2)2] and Co(NCS)2(thiourea)2,S=3/2—are characterized using several techniques in order to rationalize their relationship with structural parameters and to ascertain magnetic changes caused by substitution of the spin. Zero-field heat capacity and muon-spin relaxation measurements reveal low-temperature long-range ordering in both compounds, in addition to Ising-like (D<0) single-ion anisotropy (DCo∼−100 K, DNi∼−10 K). Crystal and electronic structure, combined with dc-field magnetometry, affirm highly quasi-one-dimensional behavior, with ferromagnetic intrachain exchange interactions JCo≈+4 and JNi∼+100 K and weak antiferromagnetic interchain exchange, on the order of J′∼−0.1 K. electron charge- and spin-density mapping reveals through-space exchange as a mechanism to explain the large discrepancy in J-values despite, from a structural perspective, the highly similar exchange pathways in both materials. Both species can be compared to the similar compounds MCl2(thiourea)4, M = Ni(II) (DTN) and Co(II) (DTC), where DTN is known to harbor two magnetic-field-induced quantum critical points. Direct comparison of DTN and DTC with the compounds studied here shows that substituting the halide Cl− ion for the NCS− ion results in a dramatic change in both the structural and magnetic properties.
| Item Type: | Journal Article | ||||||||||||||||||||||||
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| Alternative Title: | Magnetic ground-state of the one-dimensional ferromagnetic chain compounds M(NCS)2(thiourea)2; M = Ni, Co | ||||||||||||||||||||||||
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Thiourea -- Magnetic properties, Organic compounds -- Magnetic properties, Organic compounds -- Properties -- Testing, Muon spin rotation, Crystallization | ||||||||||||||||||||||||
| Journal or Publication Title: | Physical Review Materials | ||||||||||||||||||||||||
| Publisher: | American Physical Society | ||||||||||||||||||||||||
| ISSN: | 2475-9953 | ||||||||||||||||||||||||
| Official Date: | 3 March 2021 | ||||||||||||||||||||||||
| Dates: |
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| Volume: | 5 | ||||||||||||||||||||||||
| Number: | 3 | ||||||||||||||||||||||||
| Article Number: | 034401 | ||||||||||||||||||||||||
| DOI: | 10.1103/PhysRevMaterials.5.034401 | ||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||
| Reuse Statement (publisher, data, author rights): | © 2021 American Physical Society | ||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||
| Copyright Holders: | © 2021 American Physical Society | ||||||||||||||||||||||||
| Date of first compliant deposit: | 4 February 2021 | ||||||||||||||||||||||||
| Date of first compliant Open Access: | 4 March 2021 | ||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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