Influence of Cr-substitution on the electrical properties of Fe1-xCrxVSbO6

Abstract

Fe1􀀀xCrxVSbO6 solid solution is semiconductor with the activation energy decreasing both in the intrinsic and extrinsic conductivity temperature regions as the Cr-content increases. The n-type conduction is observed for Fe-richer samples while a change of the Seebeck coe cient (from n to p) for Cr-richer ones. Magnetic isotherms for all samples of solid solution under study are characteristic of the universal Brillouin function, indicating paramagnetic response. These e ects are discussed within the framework of the appearance of the mixed valence of both Fe and Cr ions.