The resonant coupling of phonons and magnons is important for the interconversion of phononic and spin degrees of freedom. We study the phonon transmission in ${\mathrm{Li}\mathrm{Nb}\mathrm{O}}_3$ manipulated by the dynamic magnetization in a $\mathrm{Ni}$ thin film. It is observed that the phonons can be absorbed strongly through resonant magnon-phonon coupling, which is realized by our modifying the magnon-phonon coupling within the $\mathrm{Ni}$ itself as well as our optimizing the interfacial coupling between $\mathrm{Ni}$ and ${\mathrm{Li}\mathrm{Nb}\mathrm{O}}_3$. The line shapes of phonon transmission are 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.

• Received 15 October 2019
• Revised 12 March 2020
• Accepted 28 April 2020

DOI:https://doi.org/10.1103/PhysRevApplied.13.054032