Evidence for dielectric aging due to progressive 180° domain wall pinning in polydomain Pb(Zr0.45Ti0.55)O3 thin films

作     者：Pavel Mokrý Yongli Wang Alexander K. Tagantsev Dragan Damjanovic Igor Stolichnov Nava Setter 

作者机构：Institute of Mechatronics and Computer Engineering Technical University of Liberec CZ-46117 Liberec Czech Republic Department of Materials Ceramics Laboratory EPFL Swiss Federal Institute of Technology CH-1015 Lausanne Switzerland 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2009年第79卷第5期

页      面：054104-054104页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：ageing electric domains ferroelectric thin films lead compounds permittivity 

摘      要：An evidence that the dielectric aging in the polydomain Pb(Zr0.45Ti0.55)O3 thin films is controlled by progressive pinning of 180° domain walls is presented. To provide such a conclusion, we use a general method, which is based on the study of the time evolution of the nonlinear but anhysteretic dielectric response of the ferroelectric to a weak electric field. A thermodynamic model of the ferroelectric system where the dielectric response is controlled by bending movements of pinned 180° domain walls is developed. Within this model, the nonlinear permittivity of the ferroelectric is expressed as a function of the microstructural parameters of the domain pattern. It is shown that by using the analysis of the time evolution of the nonlinear permittivity, it is possible to estimate changes in the concentration of the pinning centers that block the movements of the 180° domain walls during aging in polydomain perovskite ferroelectrics.