Spin-orbit precession effect in a Py/Pt/Co tri-layer structure detected by ferromagnetic resonance
Spin-orbit precession effect in a Py/Pt/Co tri-layer structure detected by ferromagnetic resonance
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DOI：
10.35848/1882-0786/aba0dc
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发表时间：
2020-07
影响因子：
2.3
通讯作者：
Y. Hibino;T. Moriyama;K. Hasegawa;T. Koyama;T. Ono;D. Chiba
中科院分区：
文献类型：
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作者：
Y. Hibino;T. Moriyama;K. Hasegawa;T. Koyama;T. Ono;D. Chiba
利用铁磁共振方法研究了Py/Pt/Co三层结构中的自旋轨道矩（SOTs），其中Py层和Co层分别为面内和垂直磁化. Py层的共振线宽明显地受到直流偏置电流的调制，这是由于Pt中的自旋霍尔效应引起的类阻尼SOT。此外，线宽调制效率被发现依赖于垂直磁化Co层的磁化极性。我们的结论是，这种行为来自一个额外的阻尼类SOT起源于自旋轨道进动效应在Pt/Co界面。
Spin–orbit torques (SOTs) acting in a Py/Pt/Co tri-layer, where the Py and Co layers are in-plane and perpendicularly magnetized, respectively, are investigated via the ferromagnetic resonance method. The resonance linewidth of the Py layer is clearly modulated by the DC bias current due to the damping-like SOT originated from the spin Hall effect in the Pt. In addition to this, the linewidth modulation efficiency is found to depend on the magnetization polarity of the perpendicularly magnetized Co layer. We conclude that this behavior comes from an additional damping-like SOT originating from the spin–orbit precession effect at the Pt/Co interface.