Electromagnetic Properties of Lanthanum Manganese Oxides Doped with Iron |
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Authors: | Oda Katsuro Miwa Yasunari Ohtsuka Hideyuki |
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Affiliation: | (1) Institute of Industrial Science, University of Tokyo, 7-22-1 Roppongi Minato-ku, Tokyo, 106-8558, Japan;(2) National Research Institute for Metals, 3-13 Sakura, Tsukuba-shi, Ibaraki, 305-0003, Japan |
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Abstract: | The mechanism of GMR effects in La(Mn1–xFex)O3 (x=0, 0.01, 0.03) oxides has been investigated by means of magnetic measurements, resistivity measurements in magnetic field and Mössbauer spectroscopy. For the x=0.01 sample, the GMR behavior is similar to that of the conventional (La, A)MnO3 (A: divalent cations) oxides. For the x=0.03 sample, even though the temperature dependence of the Mössbauer spectra was similar to that of the x=0.01 sample, the mechanism for the occurrence of the GMR effect seems to be different. The x=0 sample shows a similar behavior to the x=0.03 sample. A thermal stabilization of spin fluctuation is proposed for the x=0 and x=0.03 sample. |
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Keywords: | giant magnetoresistance perovskite ferrimagnetic coupling Mö ssbauer spectroscopy |
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