The elastic, piezoelectric and dielectric constants of tetragonal PbTiO3 single crystals

Abstract
The sound velocities of the longitudinal and transverse vibrational modes in various directions have been measured by Brillouin scattering on high-quality twin-free single crystals of tetragonal PbTiO3. By using these velocities and the dielectric permittivity measured by the impedance method, a complete set of coefficients for the electromechanical properties has been determined at ambient temperature. They are the six elastic stiffness moduli, CEijkl, three piezoelectric stress constants, erij, and four dielectric permittivity constants, εTij and εsij.