Crystal structure, Raman scattering and magnetic properties of CuCr2− xZrxSe4 and CuCr2− xSnxSe4 selenospinels

Abstract : Selenospinels, CuCr2− xMxSe4 (M = Zr and Sn), were synthesized via conventional solid-state reactions. The crystal structure of CuCr1.5Sn0.5Se4, CuCr1.7Sn0.3Se4, CuCr1.5Zr0.5Se4, and CuCr1.8Zr0.2Se4 were determined using single-crystal X-ray diffraction. All the phases crystallized in a cubic spinel-type structure. The chemical compositions of the single-crystals were examined using energy-dispersive X-ray analysis (EDS). Powder X-ray diffraction patterns of CuCr1.3Sn0.7Se4 and CuCr1.7Sn0.3Se4 were consistent with phases belonging to the Fd3¯m Space group. An analysis of the vibrational properties on the single-crystals was performed using Raman scattering measurements. The magnetic properties showed a spin glass behavior with increasing Sn content and ferromagnetic order for CuCr1.7Sn0.3Se4. © 2018
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C. Pinto, A. Galdámez, P. Barahona, S. Moris, O. Peña. Crystal structure, Raman scattering and magnetic properties of CuCr2− xZrxSe4 and CuCr2− xSnxSe4 selenospinels. Journal of Magnetism and Magnetic Materials, Elsevier, 2018, 456, pp.160-166. ⟨10.1016/j.jmmm.2018.02.023⟩. ⟨hal-01740161⟩

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