Tilted spin torque-driven ferromagnetic resonance in a perpendicular-analyzer magnetic trilayer

Tilted spin torque-driven ferromagnetic resonance in a perpendicular-analyzer magnetic trilayer
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垂直分析仪磁性三层中倾斜自旋扭矩驱动的铁磁共振

DOI:
10.1016/j.jmmm.2010.02.022
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发表时间:
2010-08
影响因子:
2.7
通讯作者:
Wang, Yan-Guo
Wang, Yan-Guo
中科院分区:
材料科学3区
文献类型:
--
作者:
Zou, Bing-Suo;He, Peng-Bin;Li, Zai-Dong;Pan, An-Lian;Liu, Quan-Hui;Wang, Ri-Xing;Wang, Yan-Guo

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对磁性三层膜中的电流驱动铁磁共振进行了理论研究。在Landau-Lifshitz-Gilbert-SLonczewski方程的基础上,用线性化方法得到了自由层和钉扎层中任意各向异性的输出直流电压。作为例子,倾斜偏振器和垂直分析器三层膜的共振谱表明,可以通过改变自旋扭矩的大小和方向来调节平衡位置、共振线宽和共振位置。通过调整电流和钉扎层的磁化方向,可以使有效损耗最小。
A theoretical study is presented on the current-driven ferromagnetic resonance in the magnetic trilayers. On the basis of the Landau–Lifshitz–Gilbert–Slonczewski equation, we derive the output dc voltage for arbitrary anisotropy in the free and pinned layers by the linearization method. As an example, the resonance spectra of the tilted-polarizer and perpendicular-analyzer trilayer show that the equilibrium position, the resonant linewidth and the resonant location can be tuned by changing the magnitude and the direction of spin torque. The effective damping can be minimized through adjusting the current and the pinned-layer magnetization direction.
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