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Related Concept Videos

Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
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Magnetic Field Due To A Thin Straight Wire01:27

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Updated: Jul 12, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

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Published on: November 21, 2019

Curvature-Induced Magnon Frequency Combs.

Hao Zhao1, Qianjun Zheng1, Peng Yan1

  • 1University of Electronic Science and Technology of China, School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, Chengdu 610054, China.

Physical Review Letters
|July 10, 2026
PubMed
Summary

Researchers generated magnon frequency combs using geometric curvature in ferromagnetic films, avoiding complex spin textures. This novel approach offers tunable spacing for magnonic devices and mimics black hole physics.

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Area of Science:

  • Condensed Matter Physics
  • Spintronics
  • Nonlinear Dynamics

Background:

  • Generating magnon frequency combs with tunable spacing is vital for applications.
  • Current methods often require complex spin textures like skyrmions or vortices.
  • A simpler, geometrically driven approach is needed.

Purpose of the Study:

  • To demonstrate magnon frequency comb generation in geometrically curved ferromagnetic films.
  • To explore the role of curvature in controlling magnon interactions.
  • To investigate potential links to gravitational physics.

Main Methods:

  • Theoretical modeling of magnon dynamics in curved ferromagnetic thin films.
  • Numerical simulations using micromagnetic analysis.
  • Analysis of three-magnon scattering processes under nonresonant driving.

Main Results:

  • Successfully generated magnon frequency combs with tunable, equally spaced frequencies.
  • Curvature induced localized, redshifted magnon bound states.
  • Curvature-driven effective anisotropy and DMI facilitated three-magnon scattering.
  • Curvature gradient effects mimicked analog event horizons.

Conclusions:

  • Geometric curvature provides a novel strategy for magnon frequency comb generation without topological spin textures.
  • This method allows for precise control over comb spacing via bound mode frequency.
  • The findings advance the development of compact magnonic devices and offer insights into geometric control of spin dynamics.