J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-920 - C6-922|
J. Phys. Colloques 42 (1981) C6-920-C6-922
BRILLOUIN SCATTERING IN SILVER HALIDEST. Hattori, T. Imanishi, H. Kurokawa et A. Mitsuishi
Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
Polarized Brillouin scattering spectra in AgBr and AgCl crystals were measured in the temperature region from room temperature to liquid phase temperature above the melting point. The anomaly that the acoustic phonon frequency shows a marked decrease at high temperature cannot be interpreted by a quasi-harmonic approximation. The discussion is given on the relation between the anomalous features and the increasing Frenkel defects.