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In this study a series of copper substituted nickel zinc ferrite nano particles with composition Ni0.55-XCuXZn0.45Fe2O4 (X=0.0, 0.05, 0.1, 0.15) were prepared by precursor method. The effect of Cu doping on phase formation and crystal structure of sample were investigated by X-Ray diffraction (XRD), IR spectroscopy (FTIR) and scanning electron microscopy (SEM). Also the room temperature saturation magnetization of samples was studied. Hysteresis loops measurements exhibited a decrease in the saturation magnetization value (Ms) of the sample from 77.5 emu/g to 32.4 emu/g . The increases in the coercivity (Hc) with increase in copper content is attributed to the bigger magneto crystalline anisotropy of Cu ions compared to Ni ions.

Magnetic and Structural Properties of NiZnFe2O4 Ferrite Nanopowders Doped with Cu2+