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Hypersonic magnetoelastic waves in inhomogeneous structures.

T Dai1, D V Kalyabin2, S A Nikitov3

  • 1Moscow Institute of Physics and Technology, 9 Instituskij per., Dolgoprudny, 141700, Moscow Region, Russia.

Ultrasonics
|January 7, 2022
PubMed
Summary
This summary is machine-generated.

This study analyzes surface magnetoelastic waves in structures with varying ferromagnetic layer thickness. Findings show resonance frequency shifts, controllable by magnetic fields, enabling potential signal processing applications.

Keywords:
Love wavesMagnetoelastic spin wavesMagnetostatic wavesPiezoelectric–ferromagnetic heterostructure

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Area of Science:

  • Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Surface magnetoelastic waves are crucial for understanding wave propagation in magnetic materials.
  • Inhomogeneous structures present unique challenges for wave propagation analysis.
  • Controlling wave properties is key for advanced device applications.

Purpose of the Study:

  • To analytically investigate the propagation of surface magnetoelastic waves in inhomogeneous ferromagnetic structures.
  • To determine the dispersion relation and attenuation of these waves considering thickness variations.
  • To explore the tunability of magnetoelastic resonance and its application in signal processing.

Main Methods:

  • Analytical derivation of the dispersion relation for surface magnetoelastic waves.
  • Calculation of wave attenuation caused by the structure's variable thickness.
  • Modeling the effect of magnetic field modification on resonance frequency.

Main Results:

  • The dispersion relation and attenuation of surface magnetoelastic waves were obtained analytically.
  • Magnetoelastic resonance frequency was found to vary with position in the inhomogeneous structure.
  • A method to control the resonance region by modifying the magnetic field was proposed.

Conclusions:

  • The study provides a theoretical framework for understanding wave propagation in inhomogeneous magnetic structures.
  • The findings demonstrate the potential for controlling magnetoelastic resonance via magnetic fields.
  • The proposed structure shows promise for applications in signal processing devices.