| La2/3(Ca60Ba40)1/3MnO3的磁电阻与磁化强度及其相关性 |
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| 引用本文： | 赖恒,陈水源,盖荣权,黄志高. La2/3(Ca60Ba40)1/3MnO3的磁电阻与磁化强度及其相关性[J]. 稀土, 2004, 25(4): 22-25 |
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| 作者姓名： | 赖恒 陈水源 盖荣权 黄志高 |
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| 作者单位： | 1. 福建师范大学,物理与光电信息科技学院,福建,福州,350007
2. 福建师范大学,物理与光电信息科技学院,福建,福州,350007;南京大学,物理系,江苏,南京,210093 |
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| 基金项目： | 教育部高等学校骨干教师资助计划，福建省自然科学基金和创新人才基金(E0010022，2000E146，E0320002andK3-070)，国家973项目(1999064508) |
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| 摘 要： | 用固相反应法制备了La2/3(Ca60Ba40)1/3MnO3多晶材料,测量了77K～320K范围内的磁化曲线及在77K～350K范围内0～1.0T外磁场下的电阻率。结果表明低场磁电阻与高场磁电阻随外磁场的变化与磁化强度(M2)的变化存在着一定相关性,采用ρ(M)∝1-M2及低温隧穿磁电阻效应和逾渗模型解释了实验结果。
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| 关 键 词： | 磁电阻 磁化强度 稀土锰氧化物 |
| 文章编号： | 1004-0277(2004)04-0022-04 |
| 修稿时间： | 2003-08-15 |
Magnetoresistance, Magnetization and Their Correlation for La2/3(Ca60Ba40)1/3MnO3 |
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| LAI Heng,CHEN Shui-yuan,GAI Rong-quan,HUANG Zhi-gao. Magnetoresistance, Magnetization and Their Correlation for La2/3(Ca60Ba40)1/3MnO3[J]. Chinese Rare Earths, 2004, 25(4): 22-25 |
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| Authors: | LAI Heng CHEN Shui-yuan GAI Rong-quan HUANG Zhi-gao |
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| Affiliation: | LAI Heng~1,CHEN Shui-yuan~1,GAI Rong-quan~1,HUANG Zhi-gao~ |
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| Abstract: | A polycrystal sample La_(2/3)(Ca_(60)Ba_(40))_(1/3)MnO_3 was prepared by standard solid reaction method. Magnetization and magnetoresistance of the sample was measured between T=77K and 350K. The experimental results indicate that some correlations exist in the external field dependency of the magnetoresistance MR and M in the low and high magnetic field regions, which is explained by the tunneling magnetoresistance model and percolation model well. |
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| Keywords: | magnetoresistance magnetization manganite |
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