Polarization reversal and backswitching dynamics in epitaxial BaTiO3 thin films Academic Article

abstract

• Polarization switching dynamics in polydomain epitaxial barium titanate (BaTiO3) thin films were investigated over the temperature range of 293363K. To determine domain dynamics, the transient response of the linear electro-optic effect was measured as a function of bias field under pulsed excitation and temperature. Upon removal of the bias pulse, domain backswitching is observed, which is described by the KohlrauschWilliamsWatts (KWW) extended exponential function in time. From the KWW kinetic parameter and its temperature and field dependences, the activation field and nucleation energy for polarization reversal are determined. The measured thermal energy barrier for nucleation is in the range of 0.1eV0.3eV and decreases with the electric field. These values are in good agreement with those recently obtained in molecular dynamics simulation studies of domain nucleation and growth in BaTiO3.

authors

• Lin, Paotai

published proceedings

• Journal of Applied Physics

author list (cited authors)

• Li, J., Lin, P. T., & Wessels, B. W.

citation count

• 20

complete list of authors

• Li, Jianheng||Lin, Pao Tai||Wessels, BW

publication date

• September 2009

publisher

• AIP Publishing  Publisher

keywords

• 40 Engineering
• 4016 Materials Engineering
• 51 Physical Sciences

Digital Object Identifier (DOI)

• 10.1063/1.3212975

start page

• 054113

volume

• 106

issue

• 5

URL

• http://dx.doi.org/10.1063/1.3212975