| La-Gd-Ca-Mn-O的磁性、电性和磁电阻效应 |
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| 引用本文： | 刘宜华,岳龙强,徐丽,黄佶,季刚,王成建,张汝贞,胡季帆,梅良膜. La-Gd-Ca-Mn-O的磁性、电性和磁电阻效应[J]. 材料科学与工程学报, 2001, 19(1): 17-20，5 |
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| 作者姓名： | 刘宜华 岳龙强 徐丽 黄佶 季刚 王成建 张汝贞 胡季帆 梅良膜 |
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| 作者单位： | 1. 山东大学物理系,
2. 山东大学实验中心, |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，G19980613，59772040，， |
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| 摘 要： | 在La0 67Ca0 33 MnO3 中进行了掺Gd研究 ,结果发现 ,经 140 0℃烧结的样品 ,获得了最佳的磁电阻效应。随掺Gd量增加 ,材料的相变温度逐渐下降 ,对应的峰值电阻率大幅度增加 ,居里温度逐渐下降 ,磁电阻比明显提高。掺入 11%的Gd后 ,可以使磁电阻比提高一个数量级。这些变化可以用晶格效应来解释。
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| 关 键 词： | 钙钛矿结构 稀土掺杂锰氧化物 超大磁电阻(CMR) |
| 文章编号： | 1004-793X(2001)01-0017-04 |
| 修稿时间： | 2000-10-02 |
Magnetic and Electric Properties and Magnetoresistive effects of La-Gd-Ca-Mn-O |
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| LIU Yi-Hua,YUE Long-qiang,XU Li,HUANG Ji,JI Gang,WANG Cheng-jian,ZHANG Ru-zhen,HU Ji-fan,MEI Liang-mo. Magnetic and Electric Properties and Magnetoresistive effects of La-Gd-Ca-Mn-O[J]. Journal of Materials Science and Engineering, 2001, 19(1): 17-20，5 |
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| Authors: | LIU Yi-Hua YUE Long-qiang XU Li HUANG Ji JI Gang WANG Cheng-jian ZHANG Ru-zhen HU Ji-fan MEI Liang-mo |
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| Affiliation: | LIU Yi|hua 1,YUE Long|qiang 1,XU Li 2,HUANG Ji 2,JI Gang 1 WANG Cheng|jian 1,ZHANG Ru|zhen 1,HU Ji|fan 1,MEI Liang|mo 1 |
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| Abstract: | The doping effects of Gd in La0.67Ca 0.33MnO3 were studied. It was found that the optimum magnetoresistive e ffect was obtained by the sample sintered at 1400℃. With increasing the doping amount of Gd, the transition temperature of the samples decreased monotonically, the corresponding peak resistivity increased dramatically, the Curie temperatur e decreased monotonically, the magnetoresistance ratio increased significantly. The substitution of 0.11% Gd for La improved the magnetoresistance ratio by an order of magnitude. These changes can be explained by the lattice effects. |
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| Keywords: | perovskite structure rare|earth doped manganicoxides colossal magnetoresistance |
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