| 溶胶-凝胶法制备的Mn基钙钛矿多晶样品中的颗粒边界效应 |
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| 引用本文： | 李建青.溶胶-凝胶法制备的Mn基钙钛矿多晶样品中的颗粒边界效应[J].低温物理学报,2004,26(1):8-15. |
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| 作者姓名： | 李建青 |
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| 作者单位： | 武汉理工大学物理系,武汉,430070 |
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| 摘 要： | 溶胶-凝胶法制备的La2/3Ca1/3MnO3多晶样品零场下观测到的电阻随温度的变化同最近针对铁磁金属颗粒体而提出的模型进行了定量的比较性研究,基于这一研究, Mn基钙钛矿多晶样品中颗粒边界效应得以讨论.
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| 关 键 词： | 颗粒边界 自旋极化隧道 电子输运 |
GRAIN BOUNDARY EFFECT IN THE SOL-GEL PREPARED POLYCRYSTALLINE MANGANITES |
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| Abstract.GRAIN BOUNDARY EFFECT IN THE SOL-GEL PREPARED POLYCRYSTALLINE MANGANITES[J].Chinese Journal of Low Temperature Physics,2004,26(1):8-15. |
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| Authors: | Abstract |
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| Abstract: | The temperature dependence of resistivity obtained in the sol-gel prepared polycrystalline La_ 2/3 Ca_ 1/3 MnO_3 samples is quantitatively studied in terms of a model recently proposed for ferromagnetic metallic granular systems. From this study,the grain boundary effect on the electrical transport is discussed for polycrystalline manganites. |
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| Keywords: | grain boundary spin-polarized tunneling electronic transport |
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