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Abstract
The micro-structural and magnetic properties are significantly modified with substitution of different elements in ferrite nanocrystalline materials. The preliminary structural analysis indicates for the synthesized M0.5Cu0.4Zn0.1Fe2O4 (M = Ni, Co) nanocrystalline ferrites that only the diffraction peaks due to the spinel ferrite phase are present and it has been crystallized in Fd 3 ¯ m space group with cubic symmetry. The SEM micrographs indicate that the particles in the sample have a strong tendency to form agglomerates, which is a typical feature of magnetic nano-materials. Two metal-oxygen bands are clearly observed for both the prepared compounds. The peak to peak line width increases with the increase in nickel nanocrystalline ferrite than cobalt nanocrystalline ferrite. Finally, when Co is substituted, Ms rises because the low magnetic moment Cu2+/Zn2+ ions in sites B are replaced by the high magnetic moment Co2+ ions.
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