The frequency dependence of the attenuation of acoustic waves in zinc oxide at microwave frequencies was measured using light-scattering techniques. For a longitudinal wave propagating along the c axis a f2 dependence was found and for a shear wave perpendicular to the c axis the frequency dependence was not f2; the most probable reason being the presence of scattering centers in the crystal.
No takes yet. Share an insight, caveat, or question.
Price et al. (1970) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: