Tuning Magnetic Properties of Magnetic Recording Media Cobalt Ferrite Nano-Particles by Co-Precipitation Method

Magnetic nano-particles of cobalt ferrite were prepared using co-precipitation method. X-ray diffraction, transmission electron microscope and Raman analysis have confirmed that the formation of cobalt ferrite nano-particles with different particle size depending on the rate of reaction and nucleation. X-ray photoelectron spectrometer analysis indicates that the reaction rate have little influence on the cation distribution in the tetrahedral and octahedral sites in the spinel lattice. The results of the magnetic hysteresis loops show that the saturation magnetization and the coercivity of cobalt ferrite nano-particles could be tuned by co-precipitation method.