Strong angular dependent transmission ratio due to interplay between spin waves and the domain wall in perpendicular magnetic anisotropy materials

TL;DR

This study demonstrates that the transmission ratio of spin waves across a domain wall in perpendicular magnetic anisotropy materials is highly dependent on the in-plane magnetization tilt angle, influenced by material and geometric factors.

Contribution

It reveals the strong angular dependence of spin wave transmission due to interplay with domain walls, highlighting potential for device optimization.

Findings

Transmission ratio varies with tilt angle in low-frequency regime

Material parameters and geometry can be tuned for desired transmission

Simulation results support the angular dependence phenomenon

Abstract

Spin waves (SW) can induce rich domain wall (DW) motion in a perpendicular-magnetic anisotropy nanostrip. In-plane magnetization tilt angle resulting from the fluctuation of the effective field of the magnetization response in the DW region plays an essential role in the dynamics of SW interacting with a DW. We performed simulation and found that the transmission ratio of the propagating SW across the DW depends strongly on the tilt angle in the low-frequency regime. The material parameters and the geometrical configuration can be fine-tuned for practical devices.