Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
AK: Akustik
AK 2: Hochfrequenzakustik - akustische Oberfl
ächenwellen (Sitzungsorganisation: Eduard Chilla, Teltow)
AK 2.4: Vortrag
Freitag, 4. März 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.