Generation and amplification of propagating spin waves by spin-orbit torque

在本项目的框架内，我们将详细研究自旋轨道力矩在磁性纳米结构中产生和放大相干传播自旋波。我们将考虑不同的方法来实现有效的可调生成的自旋波和短自旋波包的可控频率和波长，在纳米系统的基础上的导电和绝缘的磁性材料。我们还将研究克服由非相干自旋力矩增强磁振子的相干自旋波的散射所施加的限制的可能性，并通过自旋轨道力矩实现传播自旋波的真正放大。最后，我们将研究复杂的系统，其中主动自旋轨道扭矩设备通过交换放大的自旋波相互作用。拟议的研究将有助于更深入地了解自旋轨道扭矩对磁化动力学的影响，并有望刺激自旋轨道扭矩磁振子的重大进展。

Within the framework of this project, we will study in detail generation and amplification of coherent propagating spin waves in magnetic nanostructures by spin-orbit torque. We will consider different approaches to achieve efficient tunable generation of spin waves and short spin-wave packets with controllable frequency and the wavelength, in nano-systems based on both conductive and insulating magnetic materials. We will also study the possibilities to overcome limitations imposed by the scattering of coherent spin waves from incoherent spin-torque enhanced magnons and achieve true amplification of propagating spin waves by the spin-orbit torque. Finally, we will study complex systems, where active spin-orbit torque devices interact with each other via the exchange of amplified spin waves. The proposed investigations will contribute to the deeper understanding of the effects of spin-orbit torque on the magnetization dynamics and are expected to spur significant advances in spin-orbit torque magnonics.