Abstract
Alumina doped nickel ferrite nano-particles have been synthesized by the combustion route. Characterization of the products carried out using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Magnetic and surface properties of the as prepared ferrites were determining by using vibrating sample magnetometer (VSM) and N-2 adsorption at 77 K. X-ray analysis showed that all samples consisted of cubic spinel nickel ferrite. The increase in alumina content brought about a decrease in all lattice parameters of Ni ferrite. The combustion method led to formation of spongy and fragile network structure. Increasing amounts of alumina brought about remarkable changes in the microstructure and porosity of nickel ferrite. Alumina doping resulted in an increase in the surface area of Ni ferrite. This treatment led to a decrease in saturation magnetization of the synthesized ferrite.