Characteristics of electric-field-induced polarization rotation in 〈001〉-poled Pb(Mg₁<sub>/</sub>₃Nb₂<sub>/</sub>₃)O₃-PbTiO₃ single crystals close to the morphotropic phase boundary
Peräntie, J.; Hagberg, J.; Uusimäki, A.; Tian, J.; Han, P. (2012-08-10)
Peräntie, J., Hagberg, J., Uusimäki, A., Tian, J., Han, P. (2012) Characteristics of electric-field-induced polarization rotation in 〈001〉-poled Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals close to the morphotropic phase boundary. Journal of Applied Physics, 112 (3), 034117. doi:10.1063/1.4745902
© 2012 American Institute of Physics. Published in this repository with the kind permission of the publisher.
The special characteristics of polarization rotation and accompanying electric-field-induced ferroelectric-ferroelectric phase transitions in 〈001〉-poled Pb(Mg₁/₃Nb₂/₃)₁₋ₓTiₓO₃ (x = 27.4, 28,8, and 30.7 mol %) single crystals close to the morphotropic phase boundary region were studied by means of dielectric and thermal measurements as a function of a unipolar electric field at various temperatures. Discontinuous first-order-type phase transition behavior was evidenced by distinct and sharp changes in polarization and thermal responses with accompanying hysteresis as a function of the electric field. All compositions of crystals showed either one or two reversible discontinuities along the polarization rotation paths, which can be understood by electric-field-induced phase transition sequences to the tetragonal phase through different monoclinic phases previously observed along the polarization rotation path. Together with increasing polarization, a field-induced reversible decrease in temperature was observed with increasing electric field, indicating increased dipolar entropy during the electric-field-induced phase transitions. Constructed electric field-temperature phase diagrams based on the polarization and thermal data suggest that the complex polarization rotation path extends to a wider composition range than previously observed. The measured thermal response showed that a transition from the monoclinic to the tetragonal phase produced a greater thermal change in comparison with a transition within two monoclinic phases.
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