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Cobalt substitution effect on the structure and magnetic proprieties of Fe3O4 nano-particles

ABSTRACT Herein, Fe3O4 and Co0.6Fe2.4O4 nanoparticles were prepared by using the coprecipitation method. In order to prove the synthesis of the spinel ferrites and to calculate the structural parameters of the sample, the X-Ray Diffraction (DRX) technique was investigated. Nano-particles morphology and their distribution were analysed using Transmission Electron microscopy (TEM). Spherical morphology with average particle size around 13 nm was observed. The magnetic properties were carried out using MPMS SQUID device, from the magnetic hysteresis loops; we can reveal that the insertion of cobalt modified the magnetic behaviour of Fe3O4 by increasing the saturation magnetisation and coercive field of Fe3O4 nanoparticle due to the high magnetic moment of cobalt cation.