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Polarization reversal and backswitching dynamics in epitaxial BaTiO3 thin films | Academic Article individual record
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
publication outlet

Journal of Applied Physics

author list (cited authors)
Li, J., Lin, P. T., & Wessels, B. W.
publication date
2009
publisher
AIP Publishing Publisher
keywords
  • 4016 Materials Engineering
  • 40 Engineering
  • 51 Physical Sciences
citation count

20

identifier
112424SE
Digital Object Identifier (DOI)
10.1063/1.3212975
start page
054113
volume
106
issue
5
URL
http://dx.doi.org/10.1063/1.3212975