Al content dependence of acoustic properties for Ca3Nb(Ga1−xAlx)3Si2O14 single crystals

Acoustic properties for Ca
₃
Nb(Ga
_1-x
Al
_x
)
₃
Si
₂
O
₁₄
[CNGAS(x)] single crystals were experimentally investigated as a function of Al substitution content. Several plate specimens of the X-, Y-, Z-, 40°Y-, and 145°Y-cut were prepared from CNGAS(x) single crystal ingots (x=0, 0.25, and 0.50) grown by Czochralski technique. Velocities of longitudinal wave, shear wave, and leaky surface acoustic wave (LSAW) were measured for the CNGAS(x) specimens at 23°C using the ultrasonic microspectroscopy (UMS) system. Densities were also measured. It was experimentally demonstrated that all of acoustic properties were linearly changed as a function of Al substitution content.