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<p>Surface Acoustic Waves (SAW) have been used in spintronic applications to decrease the magnetic field or the electric current required to act on the magnetization. A common belief is that a SAW alone cannot achieve a directed magnetic switching in a device without an assisting magnetic field or electric current. In this work, we demonstrate magnetic domain wall motion driven solely by an acoustic wave. Using XMCD-PEEM, we show extensive evidence of SAW-induced and field-free magnetic domain wall motion (DW) in the direction of the wave propagation. Our micromagnetic simulations reveal a mechanism that allows the SAW to transfer linear momentum to the DW. Experimentally, the largest DW average velocity measured was ~12 m/s, although our simulations predict that velocities in the range of 100 m/s could be attained. This new mechanism opens the door to designing innovative spintronic devices where the magnetization can be controlled exclusively by an acoustic wave.</p>

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Moving magnetic domain walls with sound alone

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月12日

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  • Alejandro Rivelles,
  • Rocío Yanes,
  • Luis Torres,
  • Manuel Abuín,
  • Javier Grandal,
  • Maedeh Sepehr,
  • Guzmán Orero-Gámez,
  • Rodrigo Guedas,
  • Laura Fernández-García,
  • Raúl Izquierdo-López,
  • Marco Maicas,
  • Maria del Mar Sanz,
  • Jorge Pedrós,
  • Fernando Calle,
  • Sandra Ruiz-Gómez,
  • Muhammad Waqas Khaliq,
  • Miguel Angel Niño,
  • Saül Vélez,
  • Michael Foerster,
  • Luis López-Díaz,
  • Jose Luis Prieto

摘要

Surface Acoustic Waves (SAW) have been used in spintronic applications to decrease the magnetic field or the electric current required to act on the magnetization. A common belief is that a SAW alone cannot achieve a directed magnetic switching in a device without an assisting magnetic field or electric current. In this work, we demonstrate magnetic domain wall motion driven solely by an acoustic wave. Using XMCD-PEEM, we show extensive evidence of SAW-induced and field-free magnetic domain wall motion (DW) in the direction of the wave propagation. Our micromagnetic simulations reveal a mechanism that allows the SAW to transfer linear momentum to the DW. Experimentally, the largest DW average velocity measured was ~12 m/s, although our simulations predict that velocities in the range of 100 m/s could be attained. This new mechanism opens the door to designing innovative spintronic devices where the magnetization can be controlled exclusively by an acoustic wave.