Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics

doi:10.1021/acs.nanolett.1c03352

	Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics
	Geng, Wanrong 1,2; Wang, Yujia 3; Tang, Yunlong 3; Zhu, Yinlian 1,3; Wu, Bo 1; Yang, Lixin 3; Feng, Yanpeng 1,2; Zou, Minjie 1,2; Ma, Xiuliang3,4
	2021-11-24
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	21 期号:22 页码:9601-9608
摘要	Flexoelectricity is an effective tool in modulating the crystallographic structures and properties of oxides for multifunctional applications. However, engineering the nonuniform strain to obtain tunable flexoelectric behaviors at the atomic scale remains an ongoing challenge in conventional substrate-imposed ferroelectric films. Here, the regulatable flexoelectric behaviors are demonstrated at atomic scale in [110]-oriented BiFeO3 thin films, which are triggered by the strainfield coupling of high-density interfacial dislocations. Using aberrationcorrected scanning transmission electron microscopy, the asymmetric polarization rotation around the single dislocation is revealed, which is induced by the gradient strain fields of the single dislocation. These strain fields are highly correlated to generate huge strain gradients between neighboring dislocations, and thereby, serial flexoelectric responses are engineered as a function of dislocation spacings in thicker BiFeO3 films. This work opens a pathway for the modulation of flexoelectric responses in ferroelectrics, which could be extended to other functional materials to create exotic phenomena.
关键词	multiferroic oxides BiFeO3 films flexoelectric effect strain-field coupling aberration-corrected transmission electron microscopy
DOI	10.1021/acs.nanolett.1c03352
收录类别	SCIE
语种	英语
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000756421600031
出版者	AMER CHEMICAL SOC
来源库	WOS
引用统计	被引频次：5[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/162423
专题	材料科学与工程学院_特聘教授组
通讯作者	Tang, Yunlong; Zhu, Yinlian
作者单位	1.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China; 2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China; 4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Geng, Wanrong,Wang, Yujia,Tang, Yunlong,et al. Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics[J]. NANO LETTERS,2021,21(22):9601-9608.
APA	Geng, Wanrong.,Wang, Yujia.,Tang, Yunlong.,Zhu, Yinlian.,Wu, Bo.,...&Ma, Xiuliang.(2021).Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics.NANO LETTERS,21(22),9601-9608.
MLA	Geng, Wanrong,et al."Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics".NANO LETTERS 21.22(2021):9601-9608.