论文标题
通过电压诱导的界面磁电效应和自旋转移扭矩对相干自旋波的非共振扩增
Nonresonant amplification of coherent spin waves through voltage-induced interface magnetoelectric effect and spin-transfer torque
论文作者
论文摘要
我们通过在超薄多层中使用动态电荷介导的磁电效应来操纵自旋波振幅的新机制，该磁性由由铁磁双层分离的介电薄膜电容器组成。可以通过局部应用于样品的振荡电压的上升和降低旋转电压的上升和降低，可以扩增和减少传播自旋波。生成自旋积累的方式使自旋转移扭矩与磁化动力学模式选择性相互作用，并仅限于某些旋转波频率，这与已知类型的自旋转移扭矩效应相反。自旋依赖性筛选的界面性质允许将固定磁化层的厚度降低到几纳米，因此所提出的效果显着有助于实现宏伟的设备以及Spintronic设备的微型化。
We present new mechanism for manipulation of the spin-wave amplitude through the use of the dynamic charge-mediated magnetoelectric effect in ultrathin multilayers composed of dielectric thin-film capacitors separated by a ferromagnetic bilayer. Propagating spin waves can be amplified and attenuated with rising and decreasing slopes of the oscillating voltage, respectively, locally applied to the sample. The way the spin accumulation is generated makes the interaction of the spin-transfer torque with the magnetization dynamics mode-selective and restricted to some range of spin-wave frequencies, which is in contrary to known types of the spin-transfer torque effects. The interfacial nature of spin-dependent screening allows to reduce the thickness of the fixed magnetization layer to a few nanometers, thus the proposed effect significantly contributes toward realization of the magnonic devices and also miniaturization of the spintronic devices.
