| Enhanced Magnetoresistance of （La0.67Ca0.33MnO3） Composites Coated by Zn0.95Co0.05O |
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| 引用本文： | 庄彬,徐妍,赖恒,黄志高,陈水源,林应斌,李山东,赖发春. Enhanced Magnetoresistance of （La0.67Ca0.33MnO3） Composites Coated by Zn0.95Co0.05O[J]. 中国物理快报, 2009, 26(5): 224-227 |
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| 作者姓名： | 庄彬 徐妍 赖恒 黄志高 陈水源 林应斌 李山东 赖发春 |
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| 作者单位： | Department of Physics, Fujian Normal University, Fuzhou 350007 |
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| 基金项目： | Supported by the National Basic Research Program of China under Grant No 2005CB623605, the Fund of National Engineering Research Center for Optoelectronic Crystalline Materials （2005DC105003）. |
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| 摘 要： | La0.7Ca0.3MnO3：xZn0.95Co0.05O （x=0.0,0.05, 0.1, 0.15mol） composites are prepared by a sol-gel process. X- ray diffraction and energy diffraction spectroscopy reveal that there is no evidence of a reaction between the La0.7 Ca0.3 MnO3 （LCMO） and Zn0.95Co0.05 O （ZCO）. Magnetization M, Curie temperature Tc and metal-insulator transition temperatures Tp are observed to decrease with increasing ZCO content. Compared with x = 0.0, a great enhancement in the magnetoresistance （MR） is observed at around Tc for x = 0.05, 0.10, 0.15. Based on the tunneling MR and percolation models, this great change of MR is well explained.
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| 关 键 词： | La0.67Ca0.33MnO3 复合涂层 强磁 凝胶过程 复合制备 射线衍射 LCMO 磁化强度 |
| 收稿时间： | 2008-10-06 |
Enhanced Magnetoresistance of (La0.67Ca0.33MnO3) Composites Coated byZn0.95Co0.05O |
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| ZHUANG Bin,XU Yan,LAI Heng,HUANG Zhi-Gao,CHEN Shui-Yuan,LIN Ying-Bin,LI Shang-Dong,LAI Fa-Chun. Enhanced Magnetoresistance of (La0.67Ca0.33MnO3) Composites Coated byZn0.95Co0.05O[J]. Chinese Physics Letters, 2009, 26(5): 224-227 |
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| Authors: | ZHUANG Bin XU Yan LAI Heng HUANG Zhi-Gao CHEN Shui-Yuan LIN Ying-Bin LI Shang-Dong LAI Fa-Chun |
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| Affiliation: | Department of Physics, Fujian Normal University, Fuzhou 350007 |
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| Abstract: | La0.7Ca0.3MnO3:xZn0.95Co0.05O (x = 0.0, 0.05, 0.1, 0.15 mol) composites are prepared by a sol-gel process. X-ray diffraction and energy diffraction spectroscopy reveal that there is no evidence of a reaction between the La0.7Ca0.3MnO3(LCMO) and Zn0.95Co0.05O (ZCO). Magnetization M, Curie temperature TC and metal-insulator transition temperatures Tp are observed to decrease with increasing ZCO content. Compared with x = 0.0, a great enhancement in the magnetoresistance (MR) is observed at around TC for x = 0.05, 0.10, 0.15. Based on the tunneling MR and percolation models, this great change of MR is well explained. |
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| Keywords: | 75.47.Gk 75.47.Lx 75.75.+a |
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