Cycloidal Magnetic Order Promoted by Labile Mixed Anionic Paths in M2(SeO3)F2 (M = Mn2+, Ni2+) | Zendy

Tianyu Zhu | Zendy; Olivier Mentré | Zendy; Haoming Yang | Zendy; Yong Jin | Zendy; Xinan Zhang | Zendy; Ángel M. ArévaloLópez | Zendy; C. Ritter | Zendy; KwangYong Choi | Zendy; Minfeng Lü | Zendy

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Cycloidal Magnetic Order Promoted by Labile Mixed Anionic Paths in M₂(SeO₃)F₂ (M = Mn²⁺, Ni²⁺)

Author(s) -

Tianyu Zhu,

Olivier Mentré,

Haoming Yang,

Yong Jin,

Xinan Zhang,

Ángel M. ArévaloLópez,

C. Ritter,

KwangYong Choi,

Minfeng Lü

Publication year - 2021

Publication title -

inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 233

eISSN - 1520-510X

pISSN - 0020-1669

DOI - 10.1021/acs.inorgchem.1c01074

Subject(s) - antiferromagnetism , chemistry , octahedron , crystallography , ferromagnetism , chain (unit) , order (exchange) , hydrothermal circulation , frustration , spin (aerodynamics) , condensed matter physics , manganese , stereochemistry , crystal structure , physics , thermodynamics , organic chemistry , finance , astronomy , seismology , geology , economics

Two M 2 (SeO 3 )F 2 fluoro-selenites (M = Mn 2+ , Ni 2+ ) have been synthesized using optimized hydrothermal reactions. Their 3D framework consists of 1D-[MO 2 F 2 ] 4- chains of edge-sharing octahedra with a rare topology of alternating O-O and F-F μ 2 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 T N ≈ 21.5 K in the Ni 2+ case. For comparison the Mn 2+ compound develops a nearly collinear spin (canted) ordering below T N ≈ 26 K with ferromagnetic chain units.

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