论文标题
基于功能分级的dzyaloshinskii-moriya相互作用的域壁二极管
Domain wall diode based on functionally graded Dzyaloshinskii-Moriya interaction
论文作者
论文摘要
我们提出了一种一般方法，用于研究具有功能分级的Dzyaloshinskii-Moriya相互作用（DMI）的双轴铁磁条纹中域壁的动力学。通过设计DMI参数的空间轮廓，我们提出了二极管的概念，该二极管的概念实现了某些拓扑电荷和螺旋性的域壁过滤。我们使用集体变量方法的其他Zhang-Li自旋转移术语来基于现象学Landau-Lifshitz-Gilbert方程。在有效的运动方程式中，DMI的梯度起着与当前驾驶竞争的驱动力的作用。所有分析预测均通过数值模拟确认。
We present a general approach for studying the dynamics of domain walls in biaxial ferromagnetic stripes with functionally graded Dzyaloshinskii-Moriya interaction (DMI). By engineering the spatial profile of the DMI parameter we propose the concept of a diode, which implements filtering of domain walls of certain topological charge and helicity. We base our study on phenomenological Landau-Lifshitz-Gilbert equations with additional Zhang-Li spin-transfer terms using a collective variable approach. In the effective equations of motion the gradients of DMI play the role of a driving force which competes with current driving. All analytical predictions are confirmed by numerical simulations.
