Phys. Rev. B 107, 054441 (2023)

Anatomy of spin-wave-driven magnetic texture motion via magnonic torques

Hanxu Ai (艾寒旭) and Jin Lan (兰金)^*

Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300354, China and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300354, China

Abstract

The interplay between spin waves and magnetic texture represents the information exchange between the fast and slow dynamical parts of magnetic systems. Here we formulate a set of magnonic torques acting on background magnetic texture, by extracting time-invariant information from the fast precessing spin waves. Under the frame of magnonic torques, we use theoretical formulations and micromagnetic simulations to investigate the spin-wave-driven domain wall motion in two typical symmetry-breaking situations: the rotational symmetry broken by the Dzyaloshinskii-Moriya interaction and the translational symmetry broken by magnetic damping. The torque-based microscopic analyses provide compact yet quantitative tools to reinterpret the magnetic texture dynamics induced by spin waves, beyond the conventional framework of global momentum conservation.