Electric-field-induced dielectric and temperature changes in a ⟨011⟩-oriented Pb(Mg₁<sub>/</sub>₃Nb₂<sub>/</sub>₃)O₃-PbTiO₃ single crystal
Peräntie, J.; Hagberg, J.; Uusimäki, A.; Jantunen, H. (2010-10-21)
Peräntie, J., Hagberg, J., Uusimäki, A., Jantunen, H. (2010) Electric-field-induced dielectric and temperature changes in a⟨011⟩-orientedPb(Mg1/3Nb2/3)O3-PbTiO3single crystal. Physical review B: Condensed matter and materials physics, 82, 134119, doi:10.1103/PhysRevB.82.134119
© 2010 The American Physical Society. Published in this repository with the kind permission of the publisher.
Dielectric and direct temperature changes induced by an electric field were investigated in a ⟨011⟩-oriented 0.72Pb(Mg₁/₃Nb₂/₃)O₃-0.28PbTiO₃ single crystal as a function of temperature. Field-induced temperature changes were measured directly from the surface of the crystal by a thermocouple. Three distinct anomalies at temperatures of ~ 68, ~96, and 128 °C were identified in the dielectric and temperature change responses of the crystal, dividing the temperature range into four distinct phase stability regions with different field-induced behaviors. Just above the depolarization temperature of 128 °C, dielectric hysteresis showed a double-loop nature caused by a reversible nonpolar-polar phase transition accompanied by an increase in the electrocaloric temperature change. Two other reversible field-induced phase transitions with different field-induced thermal behaviors were evidenced in the polarization and temperature responses in the temperature ranges of 96–128 °C and below 68 °C.
- Avoin saatavuus