Electric-field-induced phase transitions of <001>-oriented Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals

W. Ren; L. Han; R. Wicks; G. Yang; B. K. Mukherjee

doi:10.1117/12.598152

16 May 2005 Electric-field-induced phase transitions of <001>-oriented Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ single crystals

W. Ren, L. Han, R. Wicks, G. Yang, B. K. Mukherjee

Proceedings Volume 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics; (2005) https://doi.org/10.1117/12.598152
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

Electric-field-induced phase transitions and piezoelectric properties of <001>-oriented Pb(Mg_1/3Nb_2/3)O₃-32%PbTiO₃ (PMN-PT) single crystals have been investigated as a function of temperature. It was found that the phase transitions and piezoelectric properties for PMN-PT crystals are strongly dependent on temperature. The measurements of polarization and longitudinal strain as a function of a unipolar electric field show that the field for the induced monoclinic-tetragonal phase transition decreases linearly with temperature in the range between 23 °C and 75 °C. Raising the temperature can stabilize the tetragonal phase in <001>-oriented PMN-PT crystals. The effective longitudinal piezoelectric constant, d₃₃, in the monoclinic phase increases with temperature. Meanwhile in the field-induced tetragonal phase, d₃₃ is much smaller and has little change with temperature. The electric-field-induced phase transition from a cubic phase to a tetragonal phase was observed at 125 °C.

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W. Ren, L. Han, R. Wicks, G. Yang, and B. K. Mukherjee "Electric-field-induced phase transitions of <001>-oriented Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ single crystals", Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); https://doi.org/10.1117/12.598152

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