| 磁性隧道结中自旋相关输运的势垒影响 |
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| 引用本文： | 杨军,武文远,龚艳春,戴斌飞,陈蓉.磁性隧道结中自旋相关输运的势垒影响[J].解放军理工大学学报,2009,10(4):375-378. |
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| 作者姓名： | 杨军 武文远 龚艳春 戴斌飞 陈蓉 |
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| 作者单位： | 解放军理工大学,理学院,江苏,南京,211101 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 为了研究势垒对铁磁/绝缘层/半导体/绝缘层/铁磁(FM/I/SM/I/FM)双隧道结中自旋相关电子输运特性的影响,提出了在半导体层厚度合适的情况下,非对称势垒对于提高平行结构磁性双隧道结的自旋注入效率SIE(spin injection efficiency)更具优势.数值计算结果表明,当两势垒强度的比率达到合适数值时双结的SIE和隧穿磁电阻TMR(tunneling magnetore resistance)都将达到最大,这给提高从铁磁到半导体的SIE带来新选择.研究还表明,非对称势垒结构磁性隧道结中增大铁磁交换能对提高SIE和TMR都是有益的,而且铁磁交换能的增加对SIE的提高要比对TMR的提高更显著.
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| 关 键 词： | 非对称势垒 自旋注入效率 隧穿磁电阻 铁磁交换能 |
Influence of potential barr ier in spin-dependent transport
in magnetic tunnel junctions |
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| YAN GJun,WU Wen-yuan,GONG Yan-chun,DAI Bin-fei and CH ENG Rong.Influence of potential barr ier in spin-dependent transport
in magnetic tunnel junctions[J].Journal of PLA University of Science and Technology(Natural Science Edition),2009,10(4):375-378. |
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| Authors: | YAN GJun WU Wen-yuan GONG Yan-chun DAI Bin-fei and CH ENG Rong |
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| Affiliation: | Institute of Sciences;PLA Univ.of Sci.& Tech.;Nanjing 210007;China |
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| Abstract: | To investigate the influence of the potential barrier in spin-dependent transport in FM/I/SM/I/FM(ferromagnet/insulating barrier/semiconductor/insulating barrier/ferromagnet) magnetic double tunnel junctions,it was proposed that asymmetric potential barrier played a superior role in enhancing SIE(spin injection efficiency) in parallel structure of the magnetic double tunnel junctions when the layer of semiconductor was suitable.According to the numerical calculation,SIE or TMR(tunneling magnetore resistance... |
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| Keywords: | asymmetric potential barrier spin injection efficiency tunneling magnetore resistance ferromagnet exchange energy |
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