Exploring Weak Turbulence of Phonon and Magnon Beams in Magneto-Acoustic Ultrathin Films
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Safonov, Vladimir L. Bas, Derek A. Franson, Andrew Shah, Piyush J. McConney, Michael E. Newburger, Michael Page, Michael R. |
| author_facet | Safonov, Vladimir L. Bas, Derek A. Franson, Andrew Shah, Piyush J. McConney, Michael E. Newburger, Michael Page, Michael R. |
| contents | This study presents a simple theoretical model describing narrow envelope surface acoustic waves
(phonons) and spin waves (magnons) in an ultrathin ferromagnetic film. Based on the general
principles of weak wave turbulence, the model considers interactions between beams of an ideal
phonon gas and a weakly non-ideal magnon gas, which represent magnetoacoustic oscillations in
the system. Equations for the wave envelopes of phonons and magnons, along with their harmonics,
are derived, incorporating nonlinear effects from three- and four-particle interactions. In
the general non-resonant case, linear stationary envelope simulations are sufficient. These clarify
the experimentally observed angular dependence of the transmitted acoustic signal with respect
to the orientation of the magnetic field. The study highlights increased energy losses associated
with enhanced magnetoacoustic coupling. Given the broad interdisciplinary interest in weak turbulence
phenomena within condensed matter physics and nonlinear wave dynamics, our model
offers significant predictive capabilities and greatly simplifies calculations of quasiparticle beam
interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_01903 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exploring Weak Turbulence of Phonon and Magnon Beams in Magneto-Acoustic Ultrathin Films Safonov, Vladimir L. Bas, Derek A. Franson, Andrew Shah, Piyush J. McConney, Michael E. Newburger, Michael Page, Michael R. Other Condensed Matter Applied Physics This study presents a simple theoretical model describing narrow envelope surface acoustic waves (phonons) and spin waves (magnons) in an ultrathin ferromagnetic film. Based on the general principles of weak wave turbulence, the model considers interactions between beams of an ideal phonon gas and a weakly non-ideal magnon gas, which represent magnetoacoustic oscillations in the system. Equations for the wave envelopes of phonons and magnons, along with their harmonics, are derived, incorporating nonlinear effects from three- and four-particle interactions. In the general non-resonant case, linear stationary envelope simulations are sufficient. These clarify the experimentally observed angular dependence of the transmitted acoustic signal with respect to the orientation of the magnetic field. The study highlights increased energy losses associated with enhanced magnetoacoustic coupling. Given the broad interdisciplinary interest in weak turbulence phenomena within condensed matter physics and nonlinear wave dynamics, our model offers significant predictive capabilities and greatly simplifies calculations of quasiparticle beam interactions. |
| title | Exploring Weak Turbulence of Phonon and Magnon Beams in Magneto-Acoustic Ultrathin Films |
| topic | Other Condensed Matter Applied Physics |
| url | https://arxiv.org/abs/2508.01903 |