Enhanced electrical properties in bilayered ferroelectric thin films

作     者：ZHANG Hao LONG WeiJie CHEN YaQing GUO DongJie 

作者机构：Institute of Bio-inspired Structure and Surface EngineeringNanjing University of Aeronautics and Astronautics Institute of NanoScienceNanjing University of Aeronautics and Astronautics 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学 力学 天文学(英文版))

年 卷 期：2013年第56卷第3期

页      面：551-555页

核心收录：

学科分类：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）] 

基　　金：supported by the National Natural Science Foundation(Grant Nos. 50805076 and 51275237) the National Natural Science Key Corporation Foundations (Grant No. 61161120323) Science Research Foundation at NUAA (Grant No. NS2012014) 

主　　题：bilayered films X-ray diffraction scanning electron microscopy ferroelectric properties 

摘      要：Sr2Bi4Ti5O18(SBTi) single layered and Sr2Bi4Ti5O18 /Pb(Zr0.53Ti0.47)O3(SBTi/PZT) bilayered thin films have been prepared on Pt/TiO2/SiO2/Si substrates by pulsed-laser deposition(PLD).The related structural characterizations and electrical properties have been comparatively investigated.X-ray diffraction reveals that both films have crystallized into perovskite phases and scanning electron microscopy shows the sharp *** films show well-saturated ferroelectric hysteresis loops,however,compared with the single layered SBTi films,the SBTi/PZT bilayered films have significantly increased remnant polarization(Pr) and decreased coercive field(Ec),with the applied field of 260 kV/*** measured Pr and Ec of SBTi and SBTi/PZT films were 7.9 C/cm 2,88.1 kV/cm and 13.0 C/cm 2,51.2 kV/cm,*** addition,both films showed good fatigue-free characteristics,the switchable polarization decreased by 9% and 11% of the initial values after 2.2 10 9 switching cycles for the SBTi single layered films and the SBTi/PZT bilayered films,*** results may provide some guidelines for further optimization of multilayered ferroelectric thin films.