Non-collinear magnetism in the post-perovskite thiocyanate frameworks CsM(NCS)3
Madeleine Geers,Jieun Lee,Sanliang Ling,Oscar Fabelo,Laura Cañadillas-Delgado,Matthew J. Cliffe +5 more
TL;DR: The authors reported the synthesis, structure and magnetic properties of molecular post-perovskites: CsNi(NCS)3, a thiocyanate framework, and two new isostructural analogues, CsCo( NCS) 3 and CsMn(NCS) 3, showing that both are non-collinear magnets.
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Abstract: AMX3 compounds are structurally diverse, a notable example being the post-perovskite structure which adopts a two-dimensional framework with corner- and edge-sharing octahedra. Few molecular post-perovskites are known and of these, none have reported magnetic structures. Here we report the synthesis, structure and magnetic properties of molecular post-perovskites: CsNi(NCS)3, a thiocyanate framework, and two new isostructural analogues CsCo(NCS)3 and CsMn(NCS)3. Magnetisation measurements show that all three compounds undergo magnetic order. CsNi(NCS)3 (Curie temperature, TC = 8.5(1) K) and CsCo(NCS)3 (TC = 6.7(1) K) order as weak ferromagnets. On the other hand, CsMn(NCS)3 orders as an antiferromagnet (Néel temperature, TN = 16.8(8) K). Neutron diffraction data of CsNi(NCS)3 and CsMn(NCS)3, show that both are non-collinear magnets. These results suggest molecular frameworks are fruitful ground for realising the spin textures required for the next generation of information technology.
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Citations
Inorganic Metal Thiocyanates
Matthew J. Cliffe
TL;DR: This review categorizes and describes the structures, properties, and syntheses of binary and ternary metal thiocyanates, connecting them to atomic inorganic materials, and summarizes the state of knowledge for uncharacterized binary metal thiocyanates, highlighting future development opportunities.
2
Magnetic structure and properties of the honeycomb antiferromagnet [Na(OH2)3]Mn(NCS)3
Madeleine Geers,Thomas B. Gill,Andrew D. Burnett,Euan N. Bassey,Oscar Fabelo,Laura Cañadillas-Delgado,Matthew J. Cliffe +6 more
TL;DR: The magnetic structure and properties of a novel honeycomb antiferromagnet, [Na(OH2)3]Mn(NCS)3, are reported.
Pseudo-easy-axis anisotropy in antiferromagnetic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math> diamond-lattice systems
Sheila Vaidya,A. Hernández-Melían,J.P. Tidey,Samuel P. M. Curley,Shilpam Sharma,Pascal Manuel,Chennan Wang,G. L. Hannaford,Stephen J. Blundell,Zachary E. Manson,Jamie L. Manson,John Singleton,Tom Lancaster,Roger D. Johnson,Paul Goddard +14 more
TL;DR: Researchers investigate antiferromagnetic diamond-lattice systems, discovering pseudo-easy-axis anisotropy and collinear spin alignment, with similarities in magnetization and susceptibility between Cl and Br compounds, and estimate Hamiltonian parameters through analytical calculations and Monte Carlo simulations.
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