Ferroakustische Resonanz

A quantum theory of the resonant interaction between spinwaves and phonons (magneto-acoustic resonance) is presented. The interaction Hamiltonian is diagonalised and its new eigenstates, the magnetoelastic waves, are discussed. The phenomena of anomalous dispersion such as damping and the rotation of the phonon polarisation vector are calculated. Finally the connection between a classical description and this theory is given. © 1963 Springer-Verlag.