| Original Articles |
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Fe3O4 Segregation and Transport Properties of La0.67Ca0.33MnO3 |
| ZHOU Qian-Xue1;DAI Ming-Xing1;WANG Ren-Hui1;FENG Xin-Nan2;WANG Yang2;XIA Zheng-Cai2 |
| 1Department of Physics, Wuhan University, Wuhan 430072
2Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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ZHOU Qian-Xue, DAI Ming-Xing, WANG Ren-Hui et al 2006 Chin. Phys. Lett. 23 2194-2197 |
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Abstract Effect of Fe3O4 segregation at grain boundaries on the electrical transport and magnetic properties of La0.67Ca0.33MnO3 is investigated. The experimental results show that the Fe3O4 segregation not only shifts the paramagnetic--ferromagnetic transition temperature of La0.67Ca0.33MnO3 to a lower temperature region but also induces a new transition in a lower temperature region. Meanwhile, the transition processes observed in both the resistivity and magnetization curves are obviously widened. Compared to pure La0.67Ca0.33MnO3, we assume that the Fe3O4 segregation level at the grain boundaries can modify the electrical transport and magnetic properties of
La0.67Ca0.33MnO3.
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| Keywords:
71.30.+h
75.30.Kz
75.30.Vn
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Published: 01 August 2006
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| PACS: |
71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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75.30.Kz
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(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
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75.30.Vn
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