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Non-collinear magnetism in the post-perovskite thiocyanate frameworks CsM(NCS)3

Geers, Madeleine; Lee, Jie Yie; Ling, Sanliang; Fabelo, Oscar; Cañadillas-Delgado, Laura; Cliffe, Matthew J.

Non-collinear magnetism in the post-perovskite thiocyanate frameworks CsM(NCS)3 Thumbnail


Madeleine Geers

Jie Yie Lee

Oscar Fabelo

Laura Cañadillas-Delgado


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.


Geers, M., Lee, J. Y., Ling, S., Fabelo, O., Cañadillas-Delgado, L., & Cliffe, M. J. (2023). Non-collinear magnetism in the post-perovskite thiocyanate frameworks CsM(NCS)3. Chemical Science,

Journal Article Type Article
Acceptance Date Feb 18, 2023
Online Publication Date Feb 21, 2023
Publication Date Feb 21, 2023
Deposit Date Feb 21, 2023
Publicly Available Date Feb 24, 2023
Journal Chemical Science
Print ISSN 2041-6520
Electronic ISSN 2041-6539
Publisher Royal Society of Chemistry (RSC)
Peer Reviewed Peer Reviewed
Keywords General Chemistry
Public URL
Publisher URL
Additional Information This is Open Access. All publication charges for this article have been paid for by the Royal Society of Chemistry.


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