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Area of Science:

  • Condensed Matter Physics
  • Materials Science

Background:

  • Magnetic skyrmions are promising for next-generation memory devices.
  • Previous studies demonstrated large skyrmion motion driven by oscillating fields.

Purpose of the Study:

  • To investigate the motion of nanometre-sized magnetic skyrmions driven by high-frequency field oscillations.
  • To explore the potential for controlling skyrmion dynamics for high-density memory applications.

Main Methods:

  • Numerical simulations were employed to model skyrmion behavior.
  • Analysis focused on the excitation of skyrmion resonant modes under high-frequency fields.

Main Results:

  • Nanometre-sized skyrmions can be driven by high-frequency field oscillations.
  • Skyrmion motion exhibits a helical trajectory influenced by resonant modes.
  • The direction of motion differs from the in-plane field component.

Conclusions:

  • High-frequency fields can control the speed and direction of small skyrmion motion via helical trajectories.
  • This frequency-dependent control offers a distinct advantage over other skyrmion manipulation methods.