Structural characterization and magnetic properties of the spinel compound CoIn0.5Cr1.5S4 by G. E. Delgado, V. Sagredo, and F. Bolzoni

Crystal Research and Technology

Cryst. Res. Technol. 43, 141 (2008) - Abstract -

Structural characterization and magnetic properties of the spinel compound CoIn_0.5Cr_1.5S₄

G. E. Delgado, V. Sagredo*, and F. Bolzoni**

Laboratorio de Cristalografía, Departamento de Química, Facultad de Ciencias, Universidad de Los Andes, Mérida 5101, Venezuela
*Laboratorio de Magnetismo, Departamento de Física, Facultad de Ciencias, Universidad de Los Andes, Mérida 5101, Venezuela
**IMEM-CNR Institute, parco Area delle Scienze 37A, 4300 Fontanini, Parma, Italy

Keywords	semiconductor, spin-glass, X-ray powder diffraction, Rietveld refinement
PACS	75.50.Pp, 61.10.Nz
DOI	10.1002/crat.200711037

Single crystals of the magnetic semiconductor CoIn_0.5Cr_1.5S₄, belong to the system CoIn_(2-2X)Cr_(2X)S₄ with x= 0.75, was grown by the chemical transport method. X-ray powder diffraction characterization by the Rietveld method indicated that CoIn_0.5Cr_1.5S₄ crystallizes in the space group Fd-3m, Z = 8, with a = 10.0700(6) Å and V = 1021.2(1) Å³, in a normal spinel structure. The temperature dependence of the DC magnetization suggests that the studied compound presents a ferromagnetic behavior with a Curie temperature Tc = 220 K. Sharp spin-glass like behavior was found also.

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