Crystal structure and magnetic properties of titanium-based CuTi2−xMxS4 and CuCr2−xTixSe4 chalcospinels - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Solid State Chemistry Année : 2014

Crystal structure and magnetic properties of titanium-based CuTi2−xMxS4 and CuCr2−xTixSe4 chalcospinels

Résumé

CuTi2−xMxS4 (M=Fe, Mn, Co; x=0.3, 0.5) and CuCr2−xTixSe4 (x=0.3, 0.5, 0.7) chalcospinels were synthesized by conventional solid-state reactions. Their crystal structures were determined by single-crystal X-ray diffraction. All of the phases crystallized in cubic spinel-type structures (space group, F d 3 ¯ m ). For all of the chalcospinel compounds, the edge-length distortion parameter (ELD) indicated that the most distorted polyhedron was Q[(Ti,M)3Cu], which displayed an ~8% distortion from an ideal tetrahedron structure (Q=S or Se). The Mn-based thiospinel CuMn0.3Ti1.7S4 is paramagnetic, whereas the Fe-based thiospinels (CuTi2−xFexS4; x=0.3 and 0.7) are strongly antiferromagnetic due to their spin-glass states. The magnetic susceptibility measurements indicated ferromagnetic behavior for the selenospinels (CuCr2−xTixSe4; x=0.3, 0.5 and 0.7).

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Chimie
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Dates et versions

hal-01089433 , version 1 (01-12-2014)

Identifiants

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P. Barahona, A. Galdámez, F. López-Vergara, V. Manríquez, O. Peña. Crystal structure and magnetic properties of titanium-based CuTi2−xMxS4 and CuCr2−xTixSe4 chalcospinels. Journal of Solid State Chemistry, 2014, 212, pp.114-120. ⟨10.1016/j.jssc.2014.01.017⟩. ⟨hal-01089433⟩
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