Domain Engineering the Flexoelectric Response of BaTiO_(3)–SrTiO_(3) Binary Films:A Phase Field Study  

作　　者：Junyu Tao Fan Zhang Jianyuan Zhang Weijin Chen Yue Zheng 

机构地区：[1]School of Materials,Shenzhen Campus of Sun Yat-sen University,Shenzhen,518107,China [2]Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,School of Physics,Sun Yat-sen University,Guangzhou,510275,China [3]State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics,Sun Yat-sen University,Guangzhou,510275,China [4]Centre for Physical Mechanics and Biophysics,School of Physics,Sun Yat-sen University,Guangzhou,510275,China [5]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,519082,China

出　　处：《Acta Mechanica Solida Sinica》2024年第4期590-597,共8页固体力学学报（英文版）

基　　金：support from the National Natural Science Foundation of China(Grant Nos.12222214,and 12132020);the Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices(No.2022B1212010008);the Shenzhen Science and Techonlogy Program(Grant Nos.202206193000001 and 20220818181805001);Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)(SML2021SP405).

摘　　要：The flexoelectric effect describes the interplay between material polarization and strain gradient.While much research has focused on control strategies for flexoelectricity,the impact of ferroelectric domain structure on the flexoelectric effect remains elusive.Through phase field simulations,we conduct a comparative study on the flexoelectric response of two types of BaTiO_(3)–SrTiO_(3) binary films:BaTiO_(3)–SrTiO_(3) multilayers and(Ba,Sr)TiO_(3) solid solutions.Our findings reveal that the flexoelectric response of these two systems,at the same Ba/Sr ratio,differs not only in magnitude but also in other aspects like temperature dependence,linearity,and hysteresis,due to their different ferroelectric domain structures and evolution dynamics.Our study deepens our current understanding of flexoelectricity in ferroelectrics and suggests“domain engineering”as a potential way to tailor this effect.

关 键 词：FERROELECTRIC FLEXOELECTRICITY MULTILAYERS Solid solution Phase field 

分 类 号：TB34[一般工业技术—材料科学与工程]