Impact of Mo 6+ on resistivity of copper ferrite

Abstract Two series of copper ferrites are prepared using the chemical compositional formula Cu 1.0−3y Fe 2.0−2x Mo x+y O4.0. The resistivity is found to decrease for lower values of Mo while it increases for higher values of Mo. Variation of resistivity as a function of temperature exhibited four regions with three values of transition temperature indicating contribution of different conduction mechanism to each of the region. Significantly in the region –I conduction is reflected its non-dependence of temperature. Further evaluated activation energy values of C series and tetragonal structured materials are higher than other ferrites. These results are explained with different possible mechanisms.