Acoustic waves measurements on SNGS crystals and determination of material constants

We have determined the material parameters of SNGS (Sr/sub 3/NbGa/sub 3/Si/sub 2/O/sub 14/). The elastic material constants were derived from bulk acoustic wave (BAW) measurements and surface acoustic wave (SAW) measurements. Starting with the elastic tensor determined from BAWs we optimized the data set by investigating the influence of the elastic tensor components on the angular dispersion of SAW. The electromechanical coupling coefficient was derived from SAW measurement on open and short-circuited Y-cut. Additionally we measured dielectric parameters.