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  • Letter

Spin wave driven domain wall motion in easy-plane ferromagnets: A particle perspective

Jin Lan (兰金)1,* and Jiang Xiao (萧江)2,3,4,5,6,†

  • 1Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 92 Weijin Road, Tianjin 300072, China
  • 2Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
  • 3Institute for Nanoelectronics Devices and Quantum Computing, Fudan University, Shanghai 200433, China
  • 4Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
  • 5Shanghai Qi Zhi Institute, 200232 Shanghai, China
  • 6Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai 201210, China

  • *Corresponding author: lanjin@tju.edu.cn
  • †Corresponding author: xiaojiang@fudan.edu.cn
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Phys. Rev. B 106, L020404 – Published 25 July, 2022

DOI: https://doi.org/10.1103/PhysRevB.106.L020404

Abstract

In easy-plane ferromagnets, we show that the interplay between a domain wall and a spin wave packet can be formulated as the collision of two massive particles with a gravitylike attraction. In the presence of magnetic dissipation, the domain wall mimics a particle subject to viscous friction, while the spin wave packet resembles a particle of variable mass. Due to the attractive nature of the interaction, the domain wall acquires a backward displacement as a spin wave packet penetrating the domain wall, even though there is no change in momentum of the wave packet before and after penetration.

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Phys. Rev. B 106, L020404– Published 25 July, 2022
  • Received 28 April 2022
  • Revised 6 July 2022
  • Accepted 13 July 2022
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