Structural and magnetic studies of magnesium substituted nickel ferrite nanoparticles by citrate precursor method

Magnesium substituted nickel ferrite nanoparticles are prepared by using citrate precursor method. Synthesized nanoparticles are analyzed by X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy Dispersive X-ray (EDX) Analysis, Fourier transform infrared (FTIR) and Vibrating sample magnetometer (VSM). The crystalline size of nanoparticles is estimated to be 17-70 nm by using Debye Scherrer formula, Modified Scherrer formula and Williamson-Hall method. Two main peaks near 570-590 cm(-1) and 400-470 cm(-1) confirm the spinel structure. Substitution of Mg2+ ion increases the saturation magnetization value up to x = 0.4 after that decreases. Yafet-Kittel angle value increases with increasing Mg2+ concentration.