Electromechanical properties and anisotropy of acoustic waves characteristics in single crystals YAl$_3$(BO$_3$)$_4$

Velocity of bulk acoustic waves in base and rotated cuts have been measured by the ultrasonic pulse-echo method and values of C$_{ijkl}^E$ and e$_{ijk}$ in single crystals YAl$_3$(BO$_3$)$_4$ have been calculated. The value of d$_{ijk}$ piezoelectric modulus of these single crystals have been determined by quasistatic measurements, and $\varepsilon_{ij}^\sigma$ dielectric constants have been determined by the flat capacitor method. Experimental values of material constants have been applied for the study of anisotropy of acoustic waves characteristics in single crystals YAl$_3$(BO$_3$)$_4$.