| (1-x)La_(0.7)Ca_(0.3)MnO_3/xCoFe_2O_4复合体系的电子输运和磁电阻特性的研究 |
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| 引用本文： | 卫芬芬,熊曹水,熊永红,胡海鑫,殷保祥,侯娟,廖辉.(1-x)La_(0.7)Ca_(0.3)MnO_3/xCoFe_2O_4复合体系的电子输运和磁电阻特性的研究[J].低温物理学报,2009(4). |
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| 作者姓名： | 卫芬芬 熊曹水 熊永红 胡海鑫 殷保祥 侯娟 廖辉 |
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| 作者单位： | 石河子大学师范学院物理系生态物理重点实验室;华中科技大学物理学院; |
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| 摘 要： | 本文采用两步法制备了(1-x)La0.7Ca0.3MnO3/xCoFe2O4复合样品,对样品的电磁输运特性的测量表明,随着CFO含量的增加,复合样品电阻率增大,且出现双峰,而比饱和磁矩却先减小后增大;另外在样品中观察到了低温增强的磁电阻效应,这一低场磁电阻效应与颗粒晶界处传导电子所受到的自旋极化隧穿和散射有关.
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| 关 键 词： | 锰基钙钛矿氧化物 稀土掺杂 低场磁电阻 自旋极化隧穿 |
The Study of Electrical Properties and Magnetoresistance in the Composites of (1-x) La_(0.7)Ca_(0.3)MnO_3/xCoFe_2O_4 |
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| WEI Fen-fen XIONG Cao-shui XIONG Yong-hong HU Hai-xin YIN Bao-xiang HOU Jun LIAO Hui Key Laboratory of Ecophysics.The Study of Electrical Properties and Magnetoresistance in the Composites of (1-x) La_(0.7)Ca_(0.3)MnO_3/xCoFe_2O_4[J].Chinese Journal of Low Temperature Physics,2009(4). |
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| Authors: | WEI Fen-fen XIONG Cao-shui XIONG Yong-hong HU Hai-xin YIN Bao-xiang HOU Jun LIAO Hui Key Laboratory of Ecophysics |
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| Institution: | WEI Fen-fen1 XIONG Cao-shui2 XIONG Yong-hong2 HU Hai-xin2 YIN Bao-xiang1 HOU Jun1 LIAO Hui1 1Key Laboratory of Ecophysics and Department of Physics,Normal College,Shihezi University,Xinjiang Shihezi 832003,2Physics Department,Huazhong University of Science and Technology,Wuhan 430074 |
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| Abstract: | |
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| Keywords: | perovskite manganite rare-earth doping Low-Field Magnetoresistance Spin-Polarized Tunneling |
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