Structural magnetic and Mössbauer study of Fe doped La2/3Ca1/3Mn1-xFexO3 (0≤x≤0.1) manganites
نویسندگان
چکیده
We have studied the effect of Fe substitution on structural and magnetic properties of La2/3Ca1/3Mn1-xFexO3 (LCMFO; x=0, 5 and 10%) manganites. The powders were prepared by the solid state reaction method, and the final products were characterized by X-Ray Diffraction (XRD), Mössbauer Spectrometry and Magnetic Measurements. Only one single phase corresponding to the manganite phase was detected without the presence of impurities or iron phases. The hyperfine parameters of Mössbauer spectra (MS), taken at different temperatures for the doped samples, reveal the only presence of Fe ions in octahedral coordination. At low temperatures, the MS spectra were fitted with a model of three components associated to three magnetic phases of iron (ferromagnetic and paramagnetic states). These ordered and not ordered magnetic phases are related to the effects of grain size distribution in LCMFO samples. Finally, significant changes were observed in the saturation magnetization, Curie temperature and coercivity field with increasing of iron doping level.
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