Open AccessAnalysis of surface acoustic wave properties in CaYAl3O7 single crystal
Author(s) -
Р.М. Тазиев
Publication year - 2021
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 - 10.1088/1742-6596/2131/5/052099
Subject(s) - electromechanical coupling coefficient , surface acoustic wave , crystal (programming language) , piezoelectricity , tetragonal crystal system , materials science , single crystal , coupling (piping) , coupling coefficient of resonators , surface wave , acoustic wave , temperature coefficient , acoustics , condensed matter physics , optics , crystal structure , physics , chemistry , crystallography , optoelectronics , composite material , resonator , computer science , programming language
The success on the growth of new piezoelectric materials allows sufficiently increase the operating temperature of the surface acoustic wave (SAW) devices from 300°C to 1000°C. A new calcium yttrium aluminate (CaYAl 3 O 7 ) single crystal of the tetragonal symmetry has piezoelectric properties up to the temperature of 1000°C. The paper presents a numerical study of the surface acoustic wave properties in the crystal. The SAW velocity, electromechanical coupling coefficient and power flow angle are studied for different crystal cuts of CaYAl 3 O 7 . It is shown that the maximum value of SAW coupling coefficient (0.24%) is on the Z+60°-cut and wave propagation direction along the X-axis of the crystal. For the Z-cut and wave propagation direction along the X+45°-axis of crystal, the SAW coupling coefficient is equal to 0.2%. These two cuts of the crystal are potentially useful for SAW device applications.