High-Velocity Magnetic Domain Wall Motion Driven by Acoustic Spin Transfer Torque

2025/02/26 by Lu, Jiacheng, Chen, Fa, Shu, Yiming +6
#FOS: Physical sciences #Other Condensed Matter (cond-mat.other)

paper · doi:10.48550/arxiv.2502.18783

Abstract

We predict high-velocity magnetic domain wall (DW) motion driven by out-of-plane acoustic spin in surface acoustic waves (SAWs). We demonstrate that the SAW propagating at a 30-degree angle relative to the x-axis of a 128-degree Y-LiNbO3 substrate exhibits uniform out-of-plane spin angular momentum. This acoustic spin triggers the DW motion at a velocity exceeding 50 m/s in a way that is similar to the spin-transfer-torque (STT) effect. This phenomenon highlights the potential of acoustic spin in enabling rapid DW displacement, offering an innovative approach to developing energy-efficient spintronic devices.

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• Moving magnetic domain walls with sound alone
• Nonreciprocally Boosting Magnetoacoustic Coupling with Surface-Acoustic-Wave-induced Spin Transfer Torque
• Spin current generation by acousto-electric evanescent wave
• Amplification and frequency conversion of spin waves using acoustic waves
• Interaction of surface acoustic waves and magnetic thin films