Tunneling magnetoresistance of FePt/NaCl/FePt(001)

Tunneling magnetoresistance of FePt/NaCl/FePt(001)
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FePt/NaCl/FePt(001)的隧道磁阻

DOI:
10.1209/0295-5075/105/58003
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发表时间:
2014-03
期刊:
EPL
影响因子:
1.8
通讯作者:
Guo, Hong
Guo, Hong
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Tao, L. L.;Liu, D. P.;Liang, S. H.;Han, X. F.;Guo, Hong

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我们提出并从理论上研究了一种有趣且具有潜在吸引力的用于自旋电子学的磁性隧道结 FePt/NaCl/FePt(001)。它很有吸引力,因为 FePt/NaCl 界面处的应变相对较小,因此从 FePt 金属到 NaCl 势垒的自旋注入显着,因此可以获得潜在的大 TMR 比。具有 L10 FePt 对称性的电子能带穿过多数自旋和少数自旋通道的费米能级,并且具有对称性的渐逝态主导了通过面心立方氯化钠势垒的电子传输。预测了隧道磁阻比的非常可观的值。系统地分析和理解了该系统中量子传输的微观物理。
We propose and theoretically investigate an interesting and potentially very attractive magnetic tunnel junction FePt/NaCl/FePt(001) for spintronics. It is attractive because the strain at the FePt/NaCl interface is relatively small and, as a result, spin injection from the FePt metal to the NaCl barrier is significant and thus a potentially large TMR ratio can be obtained. The electronic bands with the symmetry of L10 FePt cross the Fermi level for both the majority-spin and minority-spin channels, and the evanescent state with the symmetry dominates the electron transmission through the fcc NaCl barrier. Very respectable values of the tunnel magnetoresistance ratio are predicted. The microscopic physics of quantum transport in this system is systematically analyzed and understood.
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