| Mn基钙钛矿氧化物中的自旋极化隧道输运 |
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| 引用本文： | 赵中云,李建青,田旭.Mn基钙钛矿氧化物中的自旋极化隧道输运[J].低温物理学报,2003,25(2):127-131. |
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| 作者姓名： | 赵中云 李建青 田旭 |
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| 作者单位： | 武汉理工大学理学院,武汉,430070 |
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| 摘 要： | 借助自旋极化隧道模型，对具有不同居里温度的Mn基钙铁矿氧化物的电阻率随温度和磁场的变化行为进行了计算。结果表明，模型给出的结果和献上普遍报道的实验结果在行为上有非常好的一致性，表明这类材料中所观察到的电子输运和磁性质可以基于这一模型而得以理解。
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| 关 键 词： | Mn基钙铁矿氧化物 自旋极化隧道 电子输运 磁性质 计算 顺磁绝缘体－铁磁金属转变 磁电阻 |
| 修稿时间： | 2002年11月18 |
SPIN-POLARIZED TUNNELING TRANSPORT IN PEROVSKITE MANGANITES |
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| ZHAO ZHONG-YUNLI JIAN-QINGTIAN XU College of Science,Wuhan University of Technology,Wuhan.SPIN-POLARIZED TUNNELING TRANSPORT IN PEROVSKITE MANGANITES[J].Chinese Journal of Low Temperature Physics,2003,25(2):127-131. |
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| Authors: | ZHAO ZHONG-YUNLI JIAN-QINGTIAN XU College of Science Wuhan University of Technology Wuhan |
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| Institution: | ZHAO ZHONG-YUNLI JIAN-QINGTIAN XU College of Science,Wuhan University of Technology,Wuhan 430070 |
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| Abstract: | Resistivity as a function of temperature and magnetic field is calculated in terms of spin-polarized tunneling model for perovskite manganites with different Curie temperature. It is shown that the behavior predicted by the model is in well agreement with that commonly reported in the literature. It is evidenced that both the transport and magnetic properties observed in perovskites manganites may be understood by the spin-polarized tunneling model. |
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| Keywords: | Paramagnetic insulating-ferromagnetic metallic transition spin-polarized tunneling magnetoresistance |
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