Magnetic properties of transition metal doped cobalt ferrites

The nanomaterials were attracted much attention for scientific discovery and technological application. Nanomaterials, particularly with magnetic properties were great interest for their applications in home appliances, electronic products, communication and data processing devices, radio, television, microwave, satellite communication, etc. On reviewing the various magnetic anisotropies, it was clear that the magnetic and electrical properties of cobalt ferrite materials depend on various factors. The transition metal ions doped cobalt ferrite system was selected due to its properties like high saturation magnetization, high coercivity, large magnetocrystalline anisotropy constant and dielectric parameters were greatly influenced by porosity, grain size and microstructure of the sample along with good mechanical hardness and chemical stability. Further, cobalt ferrite was hard ferrimagnetic material with high magnetic ordering temperature and it crystallizes in mixed spinel structure for this, substitution of zinc, Copper and Nickel ions allows some changes in magnetic properties.