Field-cooled-zero-field-heated and zero-field-heated dielectric behaviors of (PbMg1/3Nb2/3O3)(0.67)(PbTiO3)(0.33) single crystal

Temperature and frequency dependent dielectric measurements in the relaxer ferroelectric single crystal (PbMg1/3Nb2/3O3)(0.67)(PbTiO3)(0.33) (PMN-33%P T) are reported for measured fields along the [001] direction. A sharp phas e transition (cubic paraelectric phase<->tetragonal ferroelectric phase) wa s observed near 420 K and 425 K for the zero-field-heated and field-cooled- zero-field-heated runs, respectively. The field-cooled-zero-field-heated di electric permittivities show that the de bias field induces a long-range fe rroelectric phase transition at 357 K. In addition, the dielectric data eps ilon"(c)(f,T) taken from the field-cooled-zero-field-heated process, imply the phase coexistence of a short-range ordering (which is attributed to the local structural fluctuations between rhombohedral and tetragonal symmetri es) and a long-range ordering due to macro-domain pinning in the region of -330-380 K.