Influence of Fe3+ on perovskite oxides: La2/3Ca1/3Mn1-x Fe x O3 |
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| Authors: | Xiaodong Wang Zuxiong Xu Ruzhang Ma |
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| Affiliation: | (1) National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, 100083 Beijing, China;(2) Department of Materials Physios, University of Science and Technology Beijing, 100083 Beijing, China |
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| Abstract: | The structure and magnetoresistance properties in sintered samples of La2/3Ca1/3Mn1-x Fe x O3(0≤x≤0.84) are studied by using Mössbauer spectroscopy, XRD and magnetic measurement. There are antiferromagnetic interactions between Fe and its nearest neighbors (Fe, Mn) when 0 <x ≤0.67, which are important factors influencing the double-exchange between Mn3+ and Mn4+, Curie temperature, magnetic moment and GMR. It is suggested that the Mn3+ (Fe3+) /Mn4+ system also consists of magnetic clusters with different sizes. |
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| Keywords: | giant magnetoresistance M?ssbauer spectroscopy antiferromagnetic interaction magnetic cluster |
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