| La0.67Ca0.33CoO3的结构和磁电阻效应研究 |
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| 引用本文： | 范宝殿,张敏敏,吴成国,朱海涛. La0.67Ca0.33CoO3的结构和磁电阻效应研究[J]. 化工时刊, 2007, 21(5): 5-7 |
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| 作者姓名： | 范宝殿 张敏敏 吴成国 朱海涛 |
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| 作者单位： | 东南大学物理系,江苏,南京,211189;东南大学物理系,江苏,南京,211189;东南大学物理系,江苏,南京,211189;东南大学物理系,江苏,南京,211189 |
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| 摘 要： | 采用溶胶凝胶法制备了La0.67Ca0.33CoO3样品,利用X射线衍射和磁电阻测量,对样品进行了结构和磁电阻效应的研究。结构研究表明样品呈现十分优异的单相性。电阻测量表明在H=0 T和H=0.3 T的磁场下,样品电阻值都随着温度的降低急剧增大。样品在H=0.3 T的磁场下在T<20 K时,呈现正的磁电阻效应,最高达21%,在20 K
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| 关 键 词： | 溶胶凝胶法 结构 磁电阻 |
| 收稿时间： | 2007-03-19 |
| 修稿时间： | 2007-03-19 |
Structure and Magnetoresistance Studies on La0.67Ca0.33CoO3 |
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| Fan Baodian,Zhang Minmin,Wu Chengguo,Zhu haitao. Structure and Magnetoresistance Studies on La0.67Ca0.33CoO3[J]. Chemical Industry Times, 2007, 21(5): 5-7 |
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| Authors: | Fan Baodian Zhang Minmin Wu Chengguo Zhu haitao |
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| Affiliation: | Department of Physics, Southeast University, Jiangsu Nanjing 211189 |
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| Abstract: | The structure and magnetoresistance of the samples prepared by the sol-gel method was studied.A perfect single phase was observed by X-ray diffraction.The insulated phenomena was observed by the resistance measurement at magnetic field H=0 T and H=0.3 T.A positive magnetoresistance of the samples at T<20 K was observed reaching 21%,and a negative magnetoresistance at 20 K
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| Keywords: | sol-gel method structure magnetoresistance |
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