Relaxor-based ferroelectric single crystal solid solution (1-x) Pb (Zn1/3Nb2/3) O3-xPbTiO3, abbreviated (1-x) PZN-x PT, binary system with compositions near a morphotropic phase boundary (MPB) have attracted much attention for applications in high performance actuator, non-destructive testing and ultrasonic devices, making use of its superior piezoelectric properties . 0.91Pb (Zn1/3Nb2/3) O3-0.09PbTiO3 (91PZN-9PT) single crystal exhibits excellent piezoelectric constant (d33~2500pC/N) and high electromechanical coupling coefficient (k33~94%) in the rhombohedral(R) phase in engineered domain...