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Spin-Wave Frequency Multiplication by Magnetic Vortex Cores.

Cheng-Jie Wang1,2, Yuxin Li1,3,4, Zhe Ding1,4,5

  • 1Laboratory of Spin Magnetic Resonance, School of Physical Sciences, Anhui Province Key Laboratory of Scientific Instrument Development and Application, University of Science and Technology of China, Hefei 230026, China.

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Summary
This summary is machine-generated.

Researchers observed frequency multiplication in magnetic vortices for the first time. This discovery enables the development of nanoscale spin-based frequency multipliers and miniature frequency combs.

Keywords:
Frequency combMagnetic imagingMagnetic vortexNV centersSpin wave

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Area of Science:

  • Condensed matter physics
  • Magnonics
  • Nanotechnology

Background:

  • Frequency multiplication is crucial for integrating spin-wave devices operating at different frequencies.
  • Topological magnetic textures offer advantages in spin-wave applications, but frequency multiplication has not been observed in them.

Purpose of the Study:

  • To investigate frequency multiplication in magnetic vortices.
  • To explore the potential of topological magnetic textures for spin-wave device applications.

Main Methods:

  • Studied magnetization dynamics of magnetic vortices in micron-sized disks.
  • Utilized wide-field magnetic imaging.
  • Drove vortex core gyration using microwave fields.

Main Results:

  • Observed coherent spin-wave harmonics generated by vortex core gyration.
  • Demonstrated a universal mechanism where periodic motion of vortex cores creates a frequency comb.
  • Confirmed frequency multiplication in magnetic vortex systems.

Conclusions:

  • The findings pave the way for nanoscale, tunable spin-based frequency multipliers.
  • Opens new possibilities for developing miniature frequency combs.
  • Highlights the potential of magnetic vortices in advanced frequency generation applications.