Converse flexoelectricity around ferroelectric domain walls

doi:10.1016/j.actamat.2020.03.054

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	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
刊名	ACTA MATERIALIA
	2020-06-01
卷号	191 页码:158-165
关键词	Flexoelectricity Ferroelectric domain walls Transmission electron microscope Landau-Ginzburg-Devonshire theory First-principles calculations
ISSN号	1359-6454
DOI	10.1016/j.actamat.2020.03.054
通讯作者	Zhu, Y. L.(ylzhu@imr.ac.cn) ; Ma, X. L.(xlma@imr.ac.cn)
英文摘要	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 degrees 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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51971223] ; National Natural Science Foundation of China[51922100] ; Shenyang National Laboratory for Materials Science[L2019R06] ; Shenyang National Laboratory for Materials Science[L2019R08] ; Shenyang National Laboratory for Materials Science[L2019F01] ; Shenyang National Laboratory for Materials Science[L2019F13] ; Youth Innovation Promotion Association CAS[2016177]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000533619700014
资助机构	Key Research Program of Frontier Sciences CAS ; National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139017]
专题	金属研究所_中国科学院金属研究所
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
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.