Mossbauer Spectrum And Magnetic Property Analysis In NiZn Ferrites

Sol-gel auto-combustion method show great potential to synthesis high purity nanometer oxide powder and to dope rare-earth ions with simple equipment. The influence of radius and effective magnetic moment of rare-earth ions on structure, ions distribution and magnetic properties of samples synthesized by Sol-gel auto combustion method are investigated in detail.In this paper, we focus on the Mossbauer spectra and magnetism of rare-earth ions substitution in spinel ferrite. Recently, the presence of iron in these materials makes Mossbauer spectra to be a suitable technique in probing the local environment of iron nuclei. It can not only be used in probing the distributions of bivalence cation ions around Fe3+, such as Ni2+, Cu2+, Zn2+, but also in probing the mechanism of oxidation state and coordination environment of orthogonal phase REFeO3which depend on rare earth ions substitutions.Second, we selected Nio.5Zno.5Fe204ferrite,doping lanthanum and samarium. With the increase of doping, the sample appeared impurity phase. However, in contrast to the rare earth dopant is not found in the grain refinement effect with RE. Rare-earth doped samples and found the saturation magnetization is reduced.Finally, based on a large number of experimental data, systematically explore the sol-gel method for the synthesis of self-propagating, and the relative amount of the rare earth ion-doped sample shape, particle size, affect the microstructure and magnetic properties of doped. Provide a reference for the design of regulation with good microstructure and magnetic properties of the material.