Evolution of domain structure and frequency effect on ferroelectric properties in BIT ferroelectrics

Based on the time-dependent Ginzburg-Landau （TDGL） equation, the temporal evolution of the domain structure and hysteresis loops of polarization versus electric field were simulated by a phase-field model for Bi4Ti3O12 （BIT） ferroelectric single crystal under an applied electric field. In the static...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2007-11, Vol.17 (A01), p.64-68
Main Author: 郑学军 卢佳 周益春 吴波 陈义强
Format: Article
Language:English
Subjects:
极化频率
铁电质
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Summary:Based on the time-dependent Ginzburg-Landau （TDGL） equation, the temporal evolution of the domain structure and hysteresis loops of polarization versus electric field were simulated by a phase-field model for Bi4Ti3O12 （BIT） ferroelectric single crystal under an applied electric field. In the static electric energy induced by an applied alternating electric field, the effects of field frequency on the ferroelectric properties of BIT ferroelectrics were investigated. The results show that the evolution of ferroelectric domain structure is a gradual process including domain nucleation, domain wall motion, domain growth and domain combination. In the boundary regions of ferroelectric domain, the new domain nucleations occur and the old domains disappear. The coercive field increases with the field frequency, and it is in good agreement with the previous experiment.
ISSN:1003-6326