High temperature dc field poling effects on the structural phase transformations of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 single crystal with morphotropic phase boundary composition

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. (c) 2006 American Institute of Physics.