Converse flexoelectricity around ferroelectric domain walls

doi:10.1016/j.actamat.2020.03.054

	Converse flexoelectricity around ferroelectric domain walls
	Wang, Y. J.1; Tang, Y. L.1; Zhu, Y. L.1; Feng, Y. P.1,2; Ma, X. L.1,3
	2020-06-01
发表期刊	Acta Materialia
ISSN	13596454
卷号	191 页码:158-165
摘要	Converse flexoelectricity is the mechanical strain induced by electric polarization gradients, which is largely omitted compared with the relatively well-known direct flexoelectricity. Thoroughly understanding the converse effect may not only explain peculiar structures generated by electric polarization or field gradients, but also stimulate new ideas to the design of novel electromechanical devices. In this work, the converse flexoelectricity around ferroelectric domain walls has been studied elaborately by synergetically integrating the aberration-corrected transmission electron microscope (TEM), first-principles calculations, and the Landau-Ginzburg-Devonshire (LGD) theory, taking prototypical tetragonal ferroelectric PbTiO3 as an example. We not only uncovered the important role of converse flexoelectricity on the asymmetric structure around 90° domain walls, but also quantified the flexoelectric coefficients. This quantification is deterministic in both the magnitude and sign of flexoelectric coefficients, by the mutual verification of the atomic mapping and first-principles calculations. Our results suggest that the converse flexoelectricity cannot be neglected for understanding ferroelectric DWs and other boundaries in ferroelectric materials. © 2020 Acta Materialia Inc.
关键词	Calculations Domain walls Electromechanical devices Ferroelectricity Lead titanate Polarization Titanium compounds Transmission electron microscopy Aberration-corrected Asymmetric structures Electric polarization Ferroelectric domains First-principles calculation Flexoelectric coefficients Flexoelectricity Mechanical strain
DOI	10.1016/j.actamat.2020.03.054
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000533619700014
出版者	Acta Materialia Inc
EI入藏号	20201708513063
EI主题词	Ferroelectric materials
EI分类号	701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 921 Mathematics
来源库	Compendex
分类代码	701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 921 Mathematics
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/115593
专题	兰州理工大学
通讯作者	Zhu, Y. L.; Ma, X. L.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China; 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Yuquan Rd 19, Beijing 100049, Peoples R China; 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Peoples R China
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Wang, Y. J.,Tang, Y. L.,Zhu, Y. L.,et al. Converse flexoelectricity around ferroelectric domain walls[J]. Acta Materialia,2020,191:158-165.
APA	Wang, Y. J.,Tang, Y. L.,Zhu, Y. L.,Feng, Y. P.,&Ma, X. L..(2020).Converse flexoelectricity around ferroelectric domain walls.Acta Materialia,191,158-165.
MLA	Wang, Y. J.,et al."Converse flexoelectricity around ferroelectric domain walls".Acta Materialia 191(2020):158-165.