Dynamic response of polydomain ferroelectric barium titanate epitaxial thin films and its field dependence

Zhifu Liu*, A. L. Meier, B. W. Wessels

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The nature of ferroelectric domain dynamics in polydomain epitaxial barium titanate thin film was investigated using the linear electro-optic effect. The dynamic response was studied as a function of bias field under pulsed excitation. Upon removal of the bias pulse a millisecond long transient response was observed that is attributed to 90°domain reversal. The dynamic response and its field dependence are described by the Kohlrausch-Williams-Watts stretched exponential function in time with an average relaxation time 〈τ〉. This average time for polarization reversal is a function of applied electric field E and is given by 〈τ〉 = τ0 exp (α/E), where τ0 is the prefactor and α is the activation field. The measured activation fields depended on bias. Activation fields of 2.0 and 0.7 V/μm measured under high and low bias conditions are comparable to those observed for bulk barium titanate.

Original languageEnglish (US)
Article number064115
JournalJournal of Applied Physics
Volume104
Issue number6
DOIs
StatePublished - Oct 9 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Dynamic response of polydomain ferroelectric barium titanate epitaxial thin films and its field dependence'. Together they form a unique fingerprint.

  • Cite this