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Abstract
Mn0.3Mg0.2Zn0.5Fe2O4 and Mn0.3Mg0.2Co0.5Fe2O4 nanoparticles with particle diameters of about 13nm were synthesized by glycol-thermal method. The as-prepared specimens were then milled at different times up to 50h and the single phase spinel structure confirmed by X-ray diffraction. The properties for the as-prepared and milled samples for the two systems were deduced and contrasted. Significant changes induced by milling in particle size, magnetization, coercive field and hyperfine parameters are reported. 57Fe Mössbauer spectra at room temperature show ordered magnetic spin states in both Mn0.3Mg0.2Zn0.5Fe2O4 and Mn0.3Mg0.2Co0.5Fe2O4 by magnetization measurements.
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