Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-305-C8-308
Ultrasonic Resonance and Relaxation in RbCl:OHY. Kogure1, W.K.B. Ho2 and A.V. Granato2
1 Teikyo University of Science & Technology, Uenohara, Yamanashi 409-01, Japan
2 Physics Department, University of Illinois, Urbana, Illinois 61801-3080, U.S.A.
The change of elastic constants and mechanical loss from  elastic dipoles are calculated on the basis of a six level tunneling model. Resonance and relaxation mechanisms are treated together, and expressions for C'- and C11- sound modes are given. The results are used to analyse experimental data for the RbCl:OH system. The low temperature ultrasonic attenuation is attributed to the resonance mechanism, and the frequency and the concentration dependence are interpreted in term of dynamical and static interaction between dipoles.
© EDP Sciences 1996