Investigation of single and multidomain Pb(In_(0.5)Nb_(0.5))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 crystals with mm2 symmetry

摘要

The piezoelectric properties of Pb(In_(0.5)Nb_(0.5))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 crystals with various engineered domain configurations were investigated. Rhombohedral and monoclinic/orthorhombic crystals poled along their crystallographic [011] directions were found to possess macroscopic mm2 symmetry, with "2R" and "1O" domain, respectively. Crystals with the "2R" domain configuration were found to exhibit high extensional piezoelectric coefficients d_(33) (～1300 pC/N) and d_(32) (～-1680 pC/N), while crystals with the "1O" configuration possessed high shear coefficients d_(15) (～3500 pC/N) and d_(24) (～2070 pC/N), with relatively low extensional piezoelectric coefficients d_(33) (～340 pC/N) and d_(32) (～-260 pC/N). The observed results were explained by "polarization rotation" model, as related to their respective domain configurations.