几乎对称磁性纳米柱中的电流感生动力学
Current-Induced Dynamics in Almost Symmetric Magnetic Nanopillars
摘要：
磁性纳米器件通常包括自由层和固定参考层，自由层的配置可以通过自旋转移效应由自旋极化电流改变。在这里，我们证明了自由层和参考层的作用在其相对厚度的小范围内互换。在对称器件中，自旋转移可以引起两层的进动，但在非对称器件中，其中一层的动力学被迅速抑制。我们解释我们的结果中的磁性层之间的动态耦合由于自旋转移。
英文摘要：
Magnetic nanodevices usually include a free layer whose configuration can be changed by spin-polarized current via the spin transfer effect, and a fixed reference layer. Here, we demonstrate that the roles of the free and the reference layers interchange over a small range of their relative thicknesses. Precession of both layers can be induced by spin transfer in symmetric devices, but the dynamics of one of the layers is rapidly suppressed in asymmetric devices. We interpret our results in terms of the dynamical coupling between magnetic layers due to spin transfer.
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