Graczyk Piotr, Krawczyk Maciej
Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179, Poznan, Poland.
Institute of Physics and Quantum Information, Faculty of Physics, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 2, 61-614, Poznan, Poland.
Sci Rep. 2021 Aug 3;11(1):15692. doi: 10.1038/s41598-021-95267-1.
We present a 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 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.
我们提出了一种新机制，通过在由铁磁双层分隔的介电薄膜电容器组成的超薄多层结构中利用动态电荷介导的磁电效应来操纵自旋波幅度。传播的自旋波可以分别随着局部施加到样品上的振荡电压的上升和下降斜率而被放大和衰减。自旋积累的产生方式使得自旋转移力矩与磁化动力学的相互作用具有模式选择性，并限制在自旋波频率的一定范围内，这与已知类型的自旋转移力矩效应相反。自旋相关屏蔽的界面性质允许将固定磁化层的厚度减小到几纳米，因此所提出的效应显著有助于实现磁振子器件以及自旋电子器件的小型化。
