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Data for 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) Data for Magnetic ground-state of the one-dimensional ferromagnetic chain compounds M(NCS) 2(thiourea) 2; M = Ni, Co. [Dataset]
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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 characterised using several techniques in order to rationalise their relationship with structural parameters and 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 behaviour, with ferromagnetic intrachain exchange interactions J Co ≈ + 4 K and J Ni ∼ + 100 K and weak antiferromagnetic interchain exchange, on the order of J 0 ∼ − 0.1 K. Electron charge and spindensity 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 harbour 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: | Dataset | ||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science > Chemistry | ||||||||||||||||||||||||
| Type of Data: | Experimental data | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Thiourea -- Magnetic properties, Organic compounds -- Magnetic properties, Organic compounds -- Properties -- Testing, Muon spin rotation, Crystallization | ||||||||||||||||||||||||
| Publisher: | Department of Chemistry | ||||||||||||||||||||||||
| Official Date: | 8 February 2021 | ||||||||||||||||||||||||
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| Status: | Not Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||
| Media of Output: | .dat | ||||||||||||||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||||||||||||||
| Copyright Holders: | University of Warwick | ||||||||||||||||||||||||
| Description: | Data record consists of ZIP Archive. Raw data in .dat format of Figures 2 to 9 in the corresponding publication. Further information can be found in the Readme file in the Archive. |
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