We derive boundary conditions at the interfaces of magnetoelastic heterostructures under ferromagnetic resonance for arbitrary magnetization directions and interface shapes. We apply our formalism to magnet∣nonmagnet bilayers and magnetic grains embedded in a nonmagnetic thin film, revealing a nontrivial magnetization angle dependence of acoustic phonon pumping.
@article{arxiv.2104.05992,
title = {Dynamic Magnetoelastic Boundary Conditions and the Pumping of Phonons},
author = {Takuma Sato and Weichao Yu and Simon Streib and Gerrit E. W. Bauer},
journal= {arXiv preprint arXiv:2104.05992},
year = {2021}
}