Phonon Transport Controlled by Ferromagnetic Resonance
Chenbo Zhao, Yi Li, Zhizhi Zhang, Michael Vogel, John E. Pearson, Jianbo Wang, Wei Zhang, Valentine Novosad, Qingfang Liu, Axel Hoffmann
Abstract
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.