Abstract

In this research work, we have prepared nickel ferrite nanoparticles by using chemical route. Nanoparticle materials are characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM),transmission electron microscopes (TEM) and energy dispersive X-ray (EDX) systems. We have determined magnetic properties, size, purity, stoichiometry and morphology of samples. The samples are calcinated at different temperatures, then we found that size of particles increase with heating and powder transfer from amorphous to crystalline phase of nickel ferrite. When the size of nanoparticles decreased to less than a critical grain size (10 nm), the nanomaterials transfer from ferromagnetic to super paramagnetic materials.

Key words: Nanoparticle, nickel ferrite spinel, superparamagnetic.