Magnetic ground state of the one-dimensional ferromagnetic chain compounds \u2062(NCS)2\u2062(thiourea)2 ( =Ni,Co)<\/a><\/p>\n\n\n\nPhysical Review Materials 5, 034401 (2021)<\/p>\n\n\n\n
Abstract<\/h2>\n\n\n\n
The magnetic properties of the two isostructural molecule-based magnets\u2014Ni\u2062(NCS)2\u2062(thiourea)2, =1 [thiourea=SC\u2062(NH2)2] and Co\u2062(NCS)2\u2062(thiourea)2, =3\/2\u2014are 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 ( <0) single-ion anisotropy ( Co\u223c\u2212100 K, Ni\u223c\u221210 K). Crystal and electronic structure, combined with dc-field magnetometry, affirm highly quasi-one-dimensional behavior, with ferromagnetic intrachain exchange interactions Co\u2248+4 K and Ni\u223c+100 K and weak antiferromagnetic interchain exchange, on the order of \u2032\u223c\u22120.1 K. Electron charge- and spin-density mapping reveals through-space exchange as a mechanism to explain the large discrepancy in -values despite, from a structural perspective, the highly similar exchange pathways in both materials. Both species can be compared to the similar compounds \u2062Cl2\u2062(thiourea)4, = 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\u2212 ion for the NCS\u2212 ion results in a dramatic change in both the structural and magnetic properties.\n<\/p>\n","protected":false},"excerpt":{"rendered":"
S. P. M. Curley, R. Scatena, R. C. Williams, P. A. Goddard, P. Macchi, T. J. Hicken, T. Lancaster, F. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","publication_author":[14],"class_list":["post-6461","physics_publications","type-physics_publications","status-publish","hentry","publication_author-eckert"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications\/6461","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications"}],"about":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/types\/physics_publications"}],"author":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/media?parent=6461"}],"wp:term":[{"taxonomy":"publication_author","embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/publication_author?post=6461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}