We derive boundary conditions at the interfaces of magnetoelastic heterostructures under ferromagnetic resonance for arbitrary magnetization directions and interface shapes. apply our formalism to magnet$\vert$nonmagnet bilayers magnetic grains embedded in a nonmagnetic thin film, revealing nontrivial angle dependence acoustic phonon pumping.

The acoustically driven spin-wave resonance in a phononic-crystal cavity is numerically investigated. designed enables confinement of gigahertz vibrations wavelength-scale point-defect structure and sustains variety modes. Inhomogeneous strain distributions the modes modify magnetostrictive coupling excitation susceptible to an external-field orientation. In particular, monopole-like mode havin...