Velocity angular dispersion of surface and bulk modes in LiTaO[sub 3] at hypersonic frequencies

Kuok, M. H.; Ng, S. C.; Zhang, V. L.; Fan, H. J.
January 2001
Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p607
Academic Journal
The existence of two surface acoustic waves, the Rayleigh wave and the second leaky wave, on X-cut LiTaO[sub 3] has been detected using Brillouin scattering. Evidence of dispersion between ultrasonic and hypersonic velocities was found for both surface and bulk acoustic waves. Elastic constant values were determined from a simultaneous least-squares fit of the angular dispersion data for the longitudinal and the two transverse bulk acoustic modes. © 2001 American Institute of Physics.


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