Strain tunability of dielectric and ferroelectric properties in epitaxial lead titanate thin films

作     者：Jie Wang~(a)) School of Aeronautics & Astronautics,Zhejiang University,Hangzhou 310027,China 

作者机构：School of Aeronautics & Astronautics Zhejiang University Hangzhou 310027 China 

出 版 物：《Theoretical & Applied Mechanics Letters》 (力学快报（英文版）)

年 卷 期：2011年第1卷第1期

页      面：14-17页

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the financial support from the National Nature Science Foundation of China (Grants Nos.11002123 and 10832009) Zhejiang Provincial Qianjiang Talent Fund(E9027) Key Innovation Fund(2009R50025) 

主　　题：misfit strain ferroelectric thin film dielectric constant phase field model domain structures 

摘      要：Many distinguished properties of epitaxial ferroelectric thin films can be tunable through the misfit *** strain tunability of ferroelectric and dielectric properties in epitaxial lead titanate ultrathin films is numerically investigated by using a phase field model,in which the surface effect of polarization is taken into *** response of polarization to the applied electric field in the thickness direction is examined with different misfit strains at room *** is found that a compressive misfit strain increases the coercive field and the remanent polarization while a tensile misfit strain decreases both of *** nonlinear dielectric constants of the thin films with tensile misfit strains are much larger than those of the thin films without misfit strains,which are attributed to the existence of the a/c/a/c multiple domains in the thin films under tensile misfit strains.