| Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites |
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| 作者姓名： | 屈少华 姚凯伦 刘祖黎 傅华华 |
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| 作者单位： | [1]Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 [2]Department of Physics, Xiangfan University, Xiangfan 441053 [3]International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10174023 and 20490210, and the Science and Technology Research Project Foundation of the Educational Department of Hubei Province （Z200525001）. |
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| 摘 要： | We investigate the magnetic transitions in a （La1-x）2/3Ca1/3MnO3 system, which consists of paramagnetic and ferromagnetic domains, based on a magnetic theoretical percolation model In the mean-field approximation, the resistance as a function of temperature and magnetic field has been derived analytically and simulated numerically. It is found that the dependence of the critical temperature on magnetic field is linear when applied magnetic field is not too strong. Our theoretical predications are in good agreement with recent experimental observations.
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| 关 键 词： | 过滤模型 钙钛矿 杂质 外界磁场 铁磁体 顺磁性 |
| 收稿时间： | 2005-04-28 |
| 修稿时间： | 2005-04-28 |
Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites |
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| Qu ShaoHua;Yao KaiLun;Liu ZuLi;Fu HuaHua.Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites[J].Chinese Physics Letters,2005,22(10):2639-2642. |
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| Authors: | Qu ShaoHua;Yao KaiLun;Liu ZuLi;Fu HuaHua |
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