Electric field effect on polarization and depolarization behavior of the 〈0 0 1〉-oriented relaxor-based 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 single crystal

• Main Authors: Chew, Khian Hooi, Luo, H., Zhao, X.Y., Wang, J., Peng, Z., Chan, H.L.W., Choy, C.L.
• Format: Article
• Published: Elsevier 2003
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/8209/; https://doi.org/10.1016/S0921-4526(03)00493-9
• Institution: Universiti Malaya

Polarization and depolarization behavior of the <0 0 1>-oriented relaxor-based 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) single crystal were investigated through biased dielectric measurement, thermally stimulated discharging current and polarization-electric field (P-E) hysteresis loop measurements. The reversal of discharging current and the increase of remnant polarization with increasing temperature were observed in the depolarization process of the <0 0 1>-poled crystal upon heating. The biased dielectric response shows the existence of the transition between two macrodomain ferroelectric phases. It is proposed that an electric field applied along the <0 0 1> direction could induce a ferroelectric tetragonal phase, which mediates between the lower temperature ferroelectric rhombohedral phase and higher temperature paraelectric cubic phase. (C) 2003 Elsevier B.V. All rights reserved.