Anomalous spin-orbit field via the Rashba-Edelstein effect at the W/Pt interface
Anomalous spin-orbit field via the Rashba-Edelstein effect at the W/Pt interface
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DOI：
10.1103/physrevapplied.13.024009
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
S. Karube;N. Tezuka;M. Kohda;J. Nitta
中科院分区：
文献类型：
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作者：
S. Karube;N. Tezuka;M. Kohda;J. Nitta
我们用自旋-扭矩铁磁共振方法研究了NiFe20(Py)/W/Pt三层膜的自旋轨道场，证明了W/Pt界面产生了一个作用于Py层的额外的SO场。这一史无前例的磁场来源于以下三个过程：1)通过Rashba-Edelstein效应在W/Pt界面处积累自旋；2)在W层中扩散自旋输运；3)通过在Py/W界面处积累，将自旋吸收到Py层中。我们的结果意味着我们可以在铁磁/金属界面之外产生额外的SO场，并通过两种不同金属的组合来控制其强度。
We have studied spin-orbit (SO) field in Ni$_{80}$Fe$_{20}$(Py)/W/Pt trilayer by means of spin-torque ferromagnetic resonance, and demonstrated that the W/Pt interface generates an extra SO field acting on the Py layer. This unprecedented field originates from the following three processes, 1) spin accumulation at W/Pt interface via the Rashba-Edelstein effect, 2) diffusive spin transport in the W layer, and 3) spin absorption into the Py layer through accumulation at the Py/W interface. Our result means that we can create extra SO field away from the ferromagnet/ metal interface and control its strength by a combination of two different metals.