Structural, Dielectric and Magnetic Behavior of Nanocrystalline Zinc Substituted Magnesium Ferrite

Zinc substituted magnesium ferrites Zn0.2Mg0.8Fe2O4 and Zn0.4Mg0.6Fe2O4 were prepared by sol-gel auto combustion method. Rietveld profile refinement of the XRD patterns confirms the formation of a cubic spinel structure in single phase. The dielectric properties viz. dielectric constant and dielectric loss tangent tan delta increase with increasing temperature. The dielectric behavior is explained by using the mechanism of polarization process, which is correlated to that of electron exchange interaction. The saturation magnetization, coercivity and remanent magnetization decreases appreciably with increase in Zn which could be attributed to change in cation distribution.