Investigation of single and multidomain Pb(In0.5Nb0.5)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals with mm2 symmetry.

The piezoelectric properties of Pb(In0.5Nb0.5)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 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 d33 (∼1300 pC/N) and d32 (∼-1680 pC/N), while crystals with the '1O' configuration possessed high shear coefficients d15 (∼3500 pC/N) and d24 (∼2070 pC/N), with relatively low extensional piezoelectric coefficients d33 (∼340 pC/N) and d32 (∼-260 pC/N). The observed results were explained by 'polarization rotation' model, as related to their respective domain configurations. [ABSTRACT FROM AUTHOR]