Theoretical Studies on Spin-Dependent Conductance in FePt/MgO/FePt(001) Magnetic Tunnel Junctions

被引：0
|
作者：
Taniguchi, Yujiro [1 ]
Miura, Yoshio [1 ]
Abe, Kazutaka [1 ]
Shirai, Masafumi [1 ]
机构：
[1] Tohoku Univ, Elect Commun Res Inst, Sendai, Miyagi 9808577, Japan
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 11期
关键词：
First-principles calculation; L1(0)-ordered alloy; spintronics; tunnel magnetoresistance;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The spin-dependent transport properties of FePt/MgO/FePt(001) magnetic tunnel junctions have been investigated on the basis of first-principles electronic structure calculations. The totally symmetric Delta(1)-band predominantly contributes to the tunneling conductance for both the majority and the minority-spin channels. In the parallel magnetization configuration, the tunneling conductance via the majority-spin channel shows almost the same values for the junctions with the Fe- and Pt-terminated interfaces. On the other hand, the tunneling conductance via the minority-spin channel for the Fe-terminated interface is two orders of magnitude smaller than that through the Pt-terminated interface. The tunneling magnetoresistance ratio evaluated for the junction with the Fe-terminated interface exceeds 380%, which is in contrast to about 70% for that with the Pt-terminated interface.
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收藏
页码：2585 / 2588
页数：4
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