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 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.
ferroelectrics phase field theory domain polarization frequency
ZHENG Xue-jun LU Jia ZHOU Yi-chun WU Bo CHEN Yi-qiang
Faculty of Materials,Optoelectronic and Physics,Xiangtan University,Xiangtan 411105,China;Key Labora Faculty of Materials,Optoelectronic and Physics,Xiangtan University,Xiangtan 411105,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）