| Transport-magnetism Correlation and Colossal Magnetoresistance in Mixed-valent Manganites |
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| 作者姓名： | LIJianqing YUANSongliu |
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| 作者单位： | [1]DepartmentofPhysics,WuhanUniversityofTechnology,Wuhan430070,China [2]DepartmentofPhysics,HuazhongUniversityofScienceandTechnology,Wuhan430074,China |
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| 基金项目： | FundedbytheNationalNaturalScienceFoundationofChina(No.10374032) |
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| 摘 要： | A phenomenological model based on phase separation between ferromagnetic metallic and paramagnetic insulating domains was applied to analyze the electrical transport and colossal magntoresistance for mixed-valent manganites of RE2/3 AE1/3 MnO3 . The results show that the model can yield results in agreement with experimental observatioas in these mangardtes. The present approach provides a simple picture to visualize the reason that the temperature dependence of resistance ( with and without applied magnetic fields ) in these compounds has the peculiar shape, without invoking any complicated concept.
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| 关 键 词： | 亚锰酸盐钙钛矿 磁致电阻 磁转变 相分离 磁性金属 |
| 收稿时间： | 2 August 2004 |
| 修稿时间： | 18 January 2005 |
Transport-magnetism correlation and colossal magnetoresistance in mixed-valent manganites |
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| LIJianqing YUANSongliu.Transport-magnetism Correlation and Colossal Magnetoresistance in Mixed-valent Manganites[J].Journal of Wuhan University of Technology. Materials Science Edition,2005,20(2):49-52. |
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| Authors: | Li Jianqing Yuan Songliu |
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| Affiliation: | (1) Department of Physics, Wuhan University of Technology, 430070 Wuhan, China;(2) Department of Physics, Huazhong University of Science and Technology, 430074 Wuhan, China |
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| Abstract: | A phenomenological model based on phase separation between ferromagnetic metallic and paramagnetic insulating domains was applied to analyze the electrical transport and colossal magnetoresistance for mixed-valent manganites of RE_(2/3)AE_(1/3)MnO_3. The results show that the model can yield results in agreement with experimental observations in these manganites. The present approach provides a simple picture to visualize the reason that the temperature dependence of resistance (with and without applied magnetic fields) in these compounds has the peculiar shape, without invoking any complicated concept. |
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| Keywords: | manganite perovskites colossal magnetoresistance magnetic transition |
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