Elastic, piezoelectric, and dielectric properties of tetragonal Pb(Mg1∕3Nb2∕3)O3–PbTiO3 single crystals

Abstract

The elastic, piezoelectric, and dielectric properties of tetragonal 0.65Pb(Mg1∕3Nb2∕3)O3–0.35PbTiO3 (PMN-35%PT) single crystals were determined. The piezoelectric constant d33 is ∼1250pC∕N; the electromechanical coefficients k15, k31, k33, and kt are 0.70, 0.48, 0.91, and 0.61, respectively. The dielectric properties were measured as a function of temperature for (001)-oriented crystals. Compared with the crystals with compositions in the morphotropic phase boundary, PMN-35%PT crystals have much more stable phase structure from room temperature to Curie temperature, which makes them promising materials for high power applications in fabricating transducers, actuators, and generators.