Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics

doi:10.1021/acs.nanolett.1c03352

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	Atomic-Scale Tunable Flexoelectric Couplings in Oxide Multiferroics
	Geng, Wanrong 1,4; Wang, Yujia 3; Tang, Yunlong 3; Zhu, Yinlian 1,3; Wu, Bo 1; Yang, Lixin 3; Feng, Yanpeng 1,4; Zou, Minjie 1,4; Ma, Xiuliang 2,3
刊名	NANO LETTERS
	2021-11-24
卷号	21 期号:22 页码:9601-9608
关键词	multiferroic oxides BiFeO3 films flexoelectric effect strain-field coupling aberration-corrected transmission electron microscopy
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.1c03352
通讯作者	Tang, Yunlong(yltang@imr.ac.cn) ; Zhu, Yinlian(zhuyinlian@sslab.org.cn)
英文摘要	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.
资助项目	National Natural Science Foundation of China[51971223] ; National Natural Science Foundation of China[51922100] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSWJSC010] ; 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] ; Scientific Instrument Developing Project of CAS[YJKYYQ20200066] ; Youth Innovation Promotion Association of CAS[Y202048] ; Youth Innovation Promotion Association CAS[2021187] ; China National Postdoctoral Program for Innovative Talents[BX2021348]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000756421600031
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences CAS ; Shenyang National Laboratory for Materials Science ; Scientific Instrument Developing Project of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association CAS ; China National Postdoctoral Program for Innovative Talents
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173477]
专题	金属研究所_中国科学院金属研究所
通讯作者	Tang, Yunlong; Zhu, Yinlian
作者单位	1.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Phys, Beijing 100190, 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.