Phonon Transport Controlled by Ferromagnetic Resonance

TL;DR

This paper investigates how ferromagnetic resonance can control phonon transport via resonant magnon-phonon coupling, demonstrating strong phonon absorption and potential for phonon manipulation using magnetization dynamics.

Contribution

It introduces a method to manipulate phonon transmission in LiNbO3 through dynamic magnetization in a Ni film, highlighting the role of interfacial coupling and resonance effects.

Findings

Strong phonon absorption via magnon-phonon coupling

Optimized interfacial coupling enhances phonon control

Resonant line shape modifications in phonon transmission

Abstract

The resonant coupling of phonons and magnons is important for the interconversion of phononic and spin degrees of freedom. We studied the phonon transmission in LiNbO3 manipulated by the dynamic magnetization in a Ni thin film. It was observed that the phonons could be absorbed strongly through resonant magnon-phonon coupling, which was realized by optimizing the interfacial coupling between Ni and LiNbO3. The line shapes of phonon transmission were further investigated considering the magnon-phonon interconversion in the elastically driven ferromagnetic resonance process. The results promote unique routes for phonon manipulation and detection in the presence of magnetization dynamics.