Insensitivity of tunneling anisotropic magnetoresistance to non-magnetic electrodes

Insensitivity of tunneling anisotropic magnetoresistance to non-magnetic electrodes
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隧道各向异性磁阻对非磁性电极的不敏感性

DOI:
10.1063/1.4829043
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发表时间:
2013-11
影响因子:
4
通讯作者:
Pan F.
Pan F.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Y. Y.;Song C.;Wang G. Y.;Zeng F.;Pan F.

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铁磁电极在磁电阻效应和自旋注入中起着至关重要的作用,而非磁性金属电极在自旋电子学中的基本特征通常被忽略,除了它们的导电性。在这里,我们验证了室温隧道各向异性磁电阻(TAMR)行为在反铁磁基[Pt/Co]/IrMn/AlOx/金属(金属= Pt,Au,Cu,Al)结是不敏感的顶部金属电极。类似的平面外信号被检测到不同的电极,在不同的形状的平面内TAMR曲线,这是最有可能归因于磁电极的多畴结构的差异。这将为自旋电子学增加一个不同的维度。
Ferromagnetic electrodes play a crucial role in magnetoresistance effect and spin injection, whereas the essential features of non-magnetic metal electrodes in spintronics are commonly ignored except for their electrical conductivity. Here, we verify that the room-temperature tunneling anisotropic magnetoresistance (TAMR) behavior in antiferromagnet-based [Pt/Co]/IrMn/AlOx/metal (metal = Pt, Au, Cu, Al) junctions is insensitive to the top metal electrodes. Similar out-of-plane signals are detected for different electrodes, in contrast to the varied shapes of in-plane TAMR curves which are most likely attributed to the differences in the multidomain structure of the magnetic electrode. This would add a different dimension to spintronics.
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