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Cycloidal Magnetic Order Promoted by Labile Mixed Anionic Paths in M2(SeO3)F2(M = Mn2+, Ni2+)
- Authors
- Zhu, T.; Mentré, O.; Yang, H.; Jin, Y.; Zhang, X.; Arévalo-López, Á.M.; Ritter, C.; Choi, K.-Y.; Lü, M.
- Issue Date
- 16-Aug-2021
- Publisher
- American Chemical Society
- Citation
- Inorganic Chemistry, v.60, no.16, pp 12001 - 12008
- Pages
- 8
- Journal Title
- Inorganic Chemistry
- Volume
- 60
- Number
- 16
- Start Page
- 12001
- End Page
- 12008
- ISSN
- 0020-1669
1520-510X
- Abstract
- Two M2(SeO3)F2 fluoro-selenites (M = Mn2+, Ni2+) have been synthesized using optimized hydrothermal reactions. Their 3D framework consists of 1D-[MO2F2]4-chains of edge-sharing octahedra with a rare topology of alternating O-O and F-F μ2 bridges. The interchain corner-sharing connections are assisted by the mixed O vs F anionic nature and develop a complex set of M-X-M superexchanges as calculated by LDA+U. Their interplay induces prominent in-chain antiferromagnetic frustration, while the interchain exchanges are responsible for the cycloidal magnetic structure observed below TN ≈ 21.5 K in the Ni2+ case. For comparison the Mn2+ compound develops a nearly collinear spin (canted) ordering below TN ≈ 26 K with ferromagnetic chain units. © 2021 American Chemical Society.
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