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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
Corresponding AuthorZhu, Y. L.(ylzhu@imr.ac.cn) ; Ma, X. L.(xlma@imr.ac.cn)
2020-06-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume191Pages:158-165
AbstractConverse 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.
KeywordFlexoelectricity Ferroelectric domain walls Transmission electron microscope Landau-Ginzburg-Devonshire theory First-principles calculations
Funding OrganizationKey Research Program of Frontier Sciences CAS ; National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association CAS
DOI10.1016/j.actamat.2020.03.054
Indexed BySCI
Language英语
Funding ProjectKey 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 Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000533619700014
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139020
Collection中国科学院金属研究所
Corresponding AuthorZhu, Y. L.; Ma, X. L.
Affiliation1.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
Recommended Citation
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.
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