High temperature dc field poling effects on the structural phase transformations of (1-x)Pb(Mg_(1/3)Nb_(2/3))O_(3-x)PbTiO_3 single crystal with morphotropic phase boundary composition

摘要

The complex dielectric permittivity of the morphotropic phase boundary [001]-oriented PMN-x%PT single crystal with x=33%, grown by the modified Bridgman technique, has been investigated as a function of both temperature and dc poling field. Structural phase transformation sequence is discussed in the light of polarization rotation process. A remarkable shift in the rhombohedral-tetragonal phase transition temperature is observed with changing of the poling field. It is found that high temperature poled state remained stable even after removal of the field.