Open AccessNumerical investigation of surface and leaky acoustic wave properties in SrLaGa3O7 crystal
Author(s) -
Р.М. Тазиев
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1333/3/032083
Subject(s) - piezoelectricity , tetragonal crystal system , materials science , electromechanical coupling coefficient , surface acoustic wave , crystal (programming language) , coupling (piping) , piezoelectric coefficient , single crystal , temperature coefficient , acoustic wave , acoustics , condensed matter physics , crystal structure , composite material , physics , nuclear magnetic resonance , chemistry , crystallography , computer science , programming language
For surface acoustic wave (SAW) devices operating at elevated ambient temperatures, piezoelectric crystals that have stable material properties at high temperatures are desirable. The progress in the field of electronic technologies has increased the demand for high-temperature piezoelectric materials for the use in temperature and pressure sensors. Recently, SAW sensors have been operated at room temperature or 100°C ÷ 300°C at most. A new piezoelectric SrLaGa 3 O 7 crystal belongs to tetragonal symmetry class, and has stability of its piezoelectric properties up to the melting temperature of 1650°C. Numerical simulation of the properties of surface and leaky acoustic waves in the SrLaGa 3 O 7 single crystal is performed. The SAW has a maximum value of the electromechanical coupling coefficient (~ 0.25%) on Z+64°-cut and propagation direction along the X-axis. In the same propagation direction, the electromechanical coupling coefficient of the leaky wave is 3.5 times lower than that of SAW. The SAW has large electromechanical coupling coefficient value (~0.24%) on Z, X+45°-cut of the crystal. It is shown that these two cuts of the SrLaGa 3 O 7 single crystal are promising for use in the SAW devices.