Ca2MnO3X (X = Cl, Br) Oxyhalides with 1-Dimensional Ferromagnetic Chains of Square-Planar S = 2 Mn3+ - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of the American Chemical Society Année : 2023

Ca2MnO3X (X = Cl, Br) Oxyhalides with 1-Dimensional Ferromagnetic Chains of Square-Planar S = 2 Mn3+

Fabio Denis Romero
Christophe Lepoittevin
Stéphanie Kodjikian
Claire Colin
Michael Hayward

Résumé

Mixed anion oxyhalides with the formula Ca2MnO3X (X = Cl, Br) are synthesized using solid-state reaction methods. These two materials crystallize in a novel structure type due to the small ionic radius of Ca and the strong Jahn–Teller effect of Mn3+. The resulting structure (space group Cmcm) contains one-dimensional chains of MnO4 square planes, with an angle of ∼120° between neighboring planes. At low temperatures, the two materials adopt magnetic arrangements, with ferromagnetic chains coupled antiferromagnetically. On applying a magnetic field, both materials experience spin-flop transitions.

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Chimie
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Dates et versions

hal-04254363 , version 1 (09-11-2023)

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Fabio Denis Romero, Christophe Lepoittevin, Stéphanie Kodjikian, Claire Colin, Michael Hayward. Ca2MnO3X (X = Cl, Br) Oxyhalides with 1-Dimensional Ferromagnetic Chains of Square-Planar S = 2 Mn3+. Journal of the American Chemical Society, 2023, 145 (42), pp.23346-23351. ⟨10.1021/jacs.3c09088⟩. ⟨hal-04254363⟩

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