Synthesis and characterization of some ferrite nanoparticles

Three mixed ferrite systems, namely Ni-0.65 Zn-0.375 ln(x) Ti-0.025 Fe1.95-x O-4 (Ni-Zn-ln-Ti), Ni-0.65 Zn-0.35 Fe-2 O-4 (Ni-Zn) and Mn-0.75 Zn-0.18 Fe-2.07 O-4 (Mn-Zn) have been chosen for the present study to compare their structural and magnetic characterizations under different ferrite nano preparation routes. Ni-Zn-ln-Ti ferrite nanoparticles have been prepared using first by a classical ceramic method to result in sintered ferrite specs and then by mechanosynthesis approach of ball milling to have ultra fine ferrite particles. Ni-Zn and Mn-Zn ferrite nanoparticles were prepared by a soft chemical approach of coprecipitation and then heat treated the particles at different annealing temperatures for improved crystallinity. The samples were then subjected to x-ray diffraction technique, vibrating sample magnetometry and ferromagnetic resonance (FMR) spectrometry and the results are compared and discussed in the light of the existing understanding.