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

Abstract

AMX 3 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, T C = 8.5(1) K) and CsCo(NCS) 3 (T C = 6.7(1) K) order as weak ferromagnets. On the other hand, CsMn(NCS) 3 orders as an antiferromagnet (Néel temperature , T N = 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.

Citation

Geers, M., Lee, J. Y., Ling, S., Fabelo, O., Cañadillas-Delgado, L., & Cliffe, M. (2023). Non-collinear magnetism in the post-perovskite thiocyanate frameworks CsM(NCS)3. Chemical Science, https://doi.org/10.1039/d2sc06861c

• 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
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1039/d2sc06861c
• Keywords: General Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/17654874
• Publisher URL: https://pubs.rsc.org/en/Content/ArticleLanding/2023/SC/D2SC06861C
• Additional Information: This is Open Access. All publication charges for this article have been paid for by the Royal Society of Chemistry.