Parts | Days | Selection | Search | Downloads | Help

AK: Akustik

AK 2: Hochfrequenzakustik - akustische Oberfl
ächenwellen (Sitzungsorganisation: Eduard Chilla, Teltow)

AK 2.4: Talk

Friday, March 4, 2005, 15:30–15:45, TU EB222

Acoustic waves measurements on SNGS crystals and determination of material constants — •E. Chilla¹, R. Kunze², M. Weihnacht², J. Bohm³, R.B. Heimann⁴, M. Hengst⁴, and U. Straube⁵ — ¹Vectron International, Tele Filter, Teltow, Germany — ²Leibniz Institute for Solid State and Materials Research, Dresden, Germany — ³Institute for Crystal Growth, Berlin, Germany — ⁴Department of Mineralogy, Technische Universität Bergakademie Freiberg, Freiberg, Germany — ⁵Department of Physics, Martin-Luther-University, Halle, Germany

We have determined the material parameters of SNGS (Sr₃NbGa₃Si₂O₁₄). 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.