Orientation dependence on piezoresponse of lead-free piezoelectric sodium bismuth titanate epitaxial thin films  

作　　者：Jinyan Zhao Wei Ren Zhe Wang Gang Niu Lingyan Wang Yulong Zhao 

机构地区：[1]Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education&International Center for Dielectric Research School of Electronic Science and Engineering,Xi’an,P.R.China [2]State Key Laboratory for Mechanical Manufacturing System Xi’an Jiaotong University,Xi’an 710049,P.R.China

出　　处：《Journal of Advanced Dielectrics》2023年第4期41-47,共7页先进电介质学报（英文）

基　　金：supported by the Natural Science Foundation of China(Grant No.51902246);the Natural Science Fundamental Research Project of Shaanxi Province of China(No.2019JQ590);the Fundamental Research Funds for the Central Universities,and the“111 Project”of China(B14040).

摘　　要：Lead-free piezoelectric sodium bismuth titanate((Bi0.5Na0.5)TiO3,BNT)thin films were epitaxially grown onto(001)-,(110)-,and(111)-oriented Nb:SrTiO3(STO)single crystal substrates prepared by sol-gel processing.Highly oriented growth in(001),(110),and(111)BNT thin films was obtained in this work benefiting from the lattice match between the BNT film and the STO substrate.The different growth models in thin films with various orientations result in various surface morphologies dependent on the film orientation.The piezoresponse of the BNT thin films was represented exhibiting a strong orientation dependence that(110)>(001)>(111).This is contributed by the various domain switching contribution related to the crystal symmetry and polarization distribution in the three oriented thin films.

关 键 词：Sodium bismuth titanate LEAD-FREE orientation dependence thin films piezoelectric properties 

分 类 号：O48[理学—固体物理]