| LaMnO3的La位掺杂对输运特性和磁电阻的影响 |
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| 引用本文： | 周振春. LaMnO3的La位掺杂对输运特性和磁电阻的影响[J]. 丽水学院学报, 2005, 27(5): 46-51 |
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| 作者姓名： | 周振春 |
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| 作者单位： | 丽水学院,数理学院,浙江,丽水,323000 |
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| 基金项目： | 国家自然科学基金资助项目(10274070) |
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| 摘 要： | 采用固相反应法制备实验所需的多晶样品,主要探讨LaMnO3的La位分别用不同价阳离子掺杂对输运特性和磁电阻的影响,明确指出La位掺杂是提高和调制钙钛矿型锰氧化物超大磁电阻(CMR)效应的一种有效途径。实验结果表明:La1-xMxMnO3(M为Ag,Na)多晶样品当0.1
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| 关 键 词： | 钙钛矿型 La位掺杂 双交换(DE)作用 Curie温度(Tc) CMR效应 |
| 文章编号： | 1008-6749（2005）05-0046-06 |
| 收稿时间： | 2005-09-01 |
| 修稿时间： | 2005-09-01 |
Influence on Transport Properties and Magnetoresistance of Different Element Substitution in La-site of LaMnO3 |
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| Zhou Zhenchun. Influence on Transport Properties and Magnetoresistance of Different Element Substitution in La-site of LaMnO3[J]. Journal of Lishui University, 2005, 27(5): 46-51 |
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| Authors: | Zhou Zhenchun |
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| Affiliation: | College of Mathematics and Physics, Lishui University, Lishui Zhejiang 323000, China |
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| Abstract: | Polycrystalline samples were prepared successfully by solid-state reaction,and the influence on transport properties and magnetoresistance of different elements substitution in La-site of LaMnO_3 was investigated;We clearly point out that the substitution in La-site is an efficient method for promoting and modulating the CMR effect of perovskite manganite.The experimental results show that the magnetoresistance under room temperature of polycrystalline samples La_(1-x)M_xMnO_3(M=Ag,Na) get maximum when 0.1
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| Keywords: | perovskite structure substitution in La site double exchange(DE) interaction Curie temperature(T_c) CMR effect |
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