| 多通道铁磁纳米线中的自旋极化和磁电阻 |
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| 引用本文： | 霍丽娟,袁庆祝.多通道铁磁纳米线中的自旋极化和磁电阻[J].河北师范大学学报(自然科学版),2006,30(2):165-168. |
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| 作者姓名： | 霍丽娟 袁庆祝 |
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| 作者单位： | 石家庄职业技术学院,基础部,河北,石家庄,050081;河北师范大学,物理科学与信息工程学院,河北,石家庄,050016 |
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| 摘 要： | 利用散射矩阵理论,研究了多通道纳米线结构中的量子化电导、自旋极化和弹道磁电阻.结果表明:在铁磁排列时,自旋简并解除,量子化电导以e2/h为单位变化,自旋极化率可以达到33%;随着纳米线宽度的减小,弹道磁电阻增长迅速;当线细到只有一种自旋态电子通过时,磁电阻达到无穷大,其自旋极化率为100%.
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| 关 键 词： | 铁磁纳米线 自旋极化 磁电阻 |
| 文章编号： | 1000-5854(2006)02-0165-04 |
| 收稿时间： | 2005-06-24 |
| 修稿时间： | 2005年6月24日 |
Spin-polarization and Magnetoresistance in Multi-channel Ferromagnetic Nanowire |
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| HUO Li-juan,YUAN Qing-zhu.Spin-polarization and Magnetoresistance in Multi-channel Ferromagnetic Nanowire[J].Journal of Hebei Normal University,2006,30(2):165-168. |
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| Authors: | HUO Li-juan YUAN Qing-zhu |
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| Institution: | 1. Department of Basic Science,Shijiazhuang Vocational Technology Institute, Hebei Shijiazhuang 050081, China; 2. College of Physics Science and Information Engineering, Hebei Normal University, Hebei Shijiazhuang 050016,China |
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| Abstract: | By using scattering matrix method, the quantized conductance, spin-polarization, and magnetoresistance in multi-channel ferromagnetic nanowire are calculated. The results indicate that, in ferromagnetic alignment, spin degeneracy is removed, quantized conductance increases with the unit of e^2/h, and spin-polarization can reache 33 %. As the width of the nanowire decreases, the magnetoresistance increases. When the width of the wire is so small that only one spin state electron can tunnel the system,the magnetoresistance is infinity and the electron is completely spin-polarization. |
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| Keywords: | ferromagnetic nanowire spin-polarization magnetoresistance |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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