论文标题
通过拓扑电荷偶极子旋转波辐射
Spin Wave Radiation by a Topological Charge Dipole
论文作者
论文摘要
使用自旋波（SWS）用作旋转和宏伟的逻辑设备中的数据载体，可在低功率消耗下运行，没有焦耳加热。然而，磁性材料中SWS的受控排放和传播仍然是一个重大挑战。在这里，我们建议Skyrmion-Antiskyrmion双层形成拓扑电荷偶极子，并在平面AC磁场激发时充当有效的亚100 nm SW发射器。传播的SWS具有首选的辐射方向，其辐射模式具有透明的偶极子签名，这表明双层形成了双层。具有相同拓扑电荷的双层具有螺旋和抗螺旋空间曲线的辐射SWS，从而扩大了SW模式的类别。我们证明，发射的SWS的特性与源拓扑相关联，可以完全控制SW特征，包括它们的振幅，首选的传播方向和波长。
The use of spin waves (SWs) as data carriers in spintronic and magnonic logic devices offers operation at low power consumption, free of Joule heating. Nevertheless, the controlled emission and propagation of SWs in magnetic materials remains a significant challenge. Here, we propose that skyrmion-antiskyrmion bilayers form topological charge dipoles and act as efficient sub-100 nm SW emitters when excited by in-plane ac magnetic fields. The propagating SWs have a preferred radiation direction, with clear dipole signatures in their radiation pattern, suggesting that the bilayer forms a SW antenna. Bilayers with the same topological charge radiate SWs with spiral and antispiral spatial profiles, enlarging the class of SW patterns. We demonstrate that the characteristics of the emitted SWs are linked to the topology of the source, allowing for full control of the SW features, including their amplitude, preferred direction of propagation, and wavelength.
