Abstract: The samples of Mg1-xZnxFe2O4 spinel ferrites with (x = 0.0, 0.50 and 1.00) were prepared by ceramic and sol-gel auto combustion method. X-ray diffraction (XRD) technique was used to confirm the single phase formation of samples. The crystallite size (t) was determined using Scherrer’s formula and found to be 4 µm and 38 nm for ceramic and sol-gel prepared samples respectively. The lattice constant, unit cell volume, X-ray density of all these structural parameters are obtained from XRD data, shows the strong effect of particle size. The magnetic properties were investigated using pulse field hysteresis loop technique at room temperature. The saturation magnetization (Ms) and coercivity (Hc) increases with increase in particle size. Thus, the particle size of the Mg-Zn sample strongly influences the structural and magnetic properties of Mg1-xZnxFe2O4.With the zinc substitution the lattice constant, X-ray density increases whereas magnetic properties are decreased.

Keywords: Nanocrystalline, Magnesium-Zinc, Magnetization, Spinel Ferrite.