Structural, electrical and magnetic properties of copper substituted Zn–Mn ferrites

Optimum composition (x = 0.0–0.75) of copper substituted Zn0.25Mn0.75−xCuxFe2O4 ferrites system have been synthesized by simple chemical co-precipitation method. X-ray diffraction pattern of all samples shows characteristic features of nanocrystalline cubic spinel structure of ferrites. The average grain size of the samples was measured using scanning electron micrographs. The saturation magnetization, coercivity and remanance were studied as a function of copper content in the host ferrite materials. Electrical resistivity of the samples was measured by two probe method. The semiconducting nature of the samples was noted from variation of electrical resistivity with temperature. The effect of copper substitution in ferrites was studied through the measurements of structural, electrical and magnetic properties.