Electrical and magnetic studies of the spinel system Li_0.5+<i>t</i>Cr_<i>x</i>Sb_<i>t</i>Fe_{2.5-<i>x</i>-2<i>t</i>}O₄

Abstract

The lattice constant, dc resistivity, dielectric constant, saturation magnetization and Curie temperature were studied on a series of Cr-substituted Li-Sb ferrite systems. The dc resistivity increases with increase of the chromium level. A change in slope was observed in the variation of resistivity with temperature and hence two regions of different activation energy. The study of dielectric permittivity with frequency showed dispersion for the whole system. The saturation magnetization and the Curie temperature were found to decrease with increase of the substitution level.