Abstracts by author > Davì Fabrizio

We study the coupled macroscopic and lattice wave propagation in PWO tetragonal 4/m crystals seen as continua with affine microstructure (or micromorphic). We obtain qualitative informations on the frequencies and the dispersion realtionsfor various propagation directions: exact representation for the acoustic and optic frequencies and for the coupled vibrations modes are obtained for propagation directions along the tetragonal c-axis.