| La0.67Ca0.33MnO3复合体系的磁电阻增强效应 |
| |
| 引用本文： | 唐洁,刘胜,张国宏,张力江,袁松柳. La0.67Ca0.33MnO3复合体系的磁电阻增强效应[J]. 低温物理学报, 2004, 26(3): 268-272 |
| |
| 作者姓名： | 唐洁 刘胜 张国宏 张力江 袁松柳 |
| |
| 作者单位： | 华中科技大学物理系,武汉,430074;华中科技大学物理系,武汉,430074;华中科技大学物理系,武汉,430074;华中科技大学物理系,武汉,430074;华中科技大学物理系,武汉,430074 |
| |
| 摘 要： | 在La0.67Ca0.33MnO3(LCMO)纳米颗粒体系中,采用Cu与之复合,考察复合对磁电阻性能的影响.结果表明,复合使低场磁电阻得到大幅度的增强.但和其它LCMO复合体系截然不同的是,复合体系的电阻率大幅下降.认为是在LCMO颗粒周围形成一层良导体,电子输运与颗粒边界的电子散射有关.
|
| 关 键 词： | 钙钛矿锰基氧化物 复合 边界效应 磁电阻 |
| 修稿时间： | 2003-10-21 |
ENHANCEMENT OF LOW-FIELD MAGNETORESISTANCE IN La0.67Ca0.33MnO3/Cu COMPOSITES |
| |
| TANG JIE LIU SHENG ZHANG GUO-HONG ZHANG LI-JIANG YUAN SONG-LIU. ENHANCEMENT OF LOW-FIELD MAGNETORESISTANCE IN La0.67Ca0.33MnO3/Cu COMPOSITES[J]. Chinese Journal of Low Temperature Physics, 2004, 26(3): 268-272 |
| |
| Authors: | TANG JIE LIU SHENG ZHANG GUO-HONG ZHANG LI-JIANG YUAN SONG-LIU |
| |
| Affiliation: | TANG JIE LIU SHENG ZHANG GUO-HONG ZHANG LI-JIANG YUAN SONG-LIU Department of Physics Huazhong University of Science and Technology,Wuhan 430074 |
| |
| Abstract: | The influence of Cu contents on the electrical transport properties(resistivity) of a series of composite samples of La 0.67 Ca 0.33 MnO 3/Cu is studied. Results show that the Cu phase causes the low-field magnetoresistance, and dramaticly reduces the resistivity. We suggest that the results are caused by a phase related to Cu at grain boundaries or surfaces of the La 0.67 Ca 0.33 MnO 3 grains. |
| |
| Keywords: | manganites composite grain boundary magnetoresistance |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
