Electrical properties of PMN-33PT thin film at MPB

TLDR: In this paper, the electric properties of epitaxial PMN-33PT thin film as a function of temperature and frequency were investigated and the results of electrical field tunability of complex dielectric permittivity were approximated by the Landau-Ginsburg-Devonshire theory frame by the Johnson relation.

Abstract: This paper presents a systematic investigation of the electric properties of epitaxial PMN-33PT thin film as a function of temperature and frequency. Complex impedance measurements were performed over the temperature range of 30 – 500 K and frequency range 20 Hz – 1 MHz. Obtained results were corrected for the SRO series resistance. Ferroelectric hysteresis loops and electric field tunability of the real part of dielectric permittivity were measured in the 300 K – 450 K temperature range and at a frequency of 1 kHz. The results of electrical field tunability of complex dielectric permittivity were approximated by Landau-Ginsburg-Devonshire theory frame by the Johnson relation. Meanwhile, ferroelectric hysteresis loop measurements of epitaxial PMN-33PT thin film shows a good hysteresis property with a remnant polarization of 2Pr 10 µC/cm2 and coercive field of 2Ec 12 kV/cm at temperature range from 300 K to 380 K.