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Spin wave localization in tangentially magnetized films.

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We describe localized spin wave modes in ferromagnetic films. These modes, spaced equally in frequency, match experimental and simulation results, advancing understanding of magnetic phenomena.

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Area of Science:

  • Physics, Condensed Matter
  • Materials Science

Background:

  • Localized spin wave modes are crucial for understanding magnetic phenomena in thin ferromagnetic films.
  • Parabolic magnetic field minima create unique conditions for spin wave localization.

Purpose of the Study:

  • To analytically describe localized spin wave modes in a parabolic field minimum.
  • To compare analytical predictions with micromagnetic modeling and experimental data.

Main Methods:

  • Analytical description using Hermite functions for mode profiles.
  • Numerical approximation of magnetostatic interactions.
  • Comparison with micromagnetic simulations and ferromagnetic resonance force microscopy experiments.

Main Results:

  • Spin wave modes exhibit roughly equal frequency spacing.
  • Modes show approximately equal coupling to a uniform driving field.
  • Analytical predictions align well with simulation and experimental findings.

Conclusions:

  • Hermite functions accurately describe localized spin wave modes.
  • The study validates the analytical model against experimental and simulation data.
  • This work provides a foundation for further research in spin wave dynamics.