Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films

doi:10.1021/acsnano.8b05449

IMR OpenIR

	Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films
	Geng, Wanrong 1,2; Guo, Xiangwei 1,2; Zhu, Yinlian 1; Tang, Yunlong 1; Feng, Yanpeng 1,3; Zou, Minjie 1,2; Wang, Yujia 1; Han, Mengjiao 1,3; Ma, Jinyuan 1,2,4; Wu, Bo 1,2; Hu, Wentao 1,2; Ma, Xiuliang 1,4
通讯作者	Zhu, Yinlian(ylzhu@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn)
	2018-11-01
发表期刊	ACS NANO
ISSN	1936-0851
卷号	12 期号:11 页码:11098-11105
摘要	Strongly correlated oxides exhibit multiple degrees of freedoms, which can potentially mediate exotic phases with exciting physical properties, such as the polar vortex recently found in ferroelectric oxide films. A polar vortex is stabilized by competition between charge, lattice, and/or orbital degrees of freedom, which displays vortex ferroelectric phase transitions and emergent chirality, making it a potential candidate for designing information storage and processing devices. Here, by a combination of controlled film growth and aberration-corrected scanning transmission electron microscopy, we obtain nanoscale vortex arrays in [110]-oriented BiFeO3 films. These vortex arrays are stabilized in ultrathin BiFeO3 layers sandwiched by two coherently grown orthorhombic scandate layers, exhibiting a ferroelectric morphotropic phase boundary constituted by a mixed-phase structure of polar orthorhombic BiFeO3 and rhombohedral BiFeO3. Clear polarization switching and piezoelectric signals were observed in these multilayers as revealed by piezoresponse force microscopy. This work presents a feature of a polar vortex in BiFeO3 films showing morphotropic phase boundary character, which offers a potential degree of manipulating phase components and properties of ferroelectric topological structures.
关键词	BiFeO3 ferroelectric films vortices morphotropic phase boundary aberration-corrected scanning transmission electron microscopy first-principles calculations
资助者	National Natural Science Foundation of China ; National Basic Research Program of China ; Key Research Program of Frontier Sciences CAS ; IMR SYNL-T.S. Ke Research Fellowship ; Youth Innovation Promotion Association CAS
DOI	10.1021/acsnano.8b05449
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51571197] ; National Natural Science Foundation of China[51501194] ; National Natural Science Foundation of China[51401212] ; National Natural Science Foundation of China[51671194] ; National Basic Research Program of China[2014CB921002] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; IMR SYNL-T.S. Ke Research Fellowship ; Youth Innovation Promotion Association CAS[2016177]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000451789200049
出版者	AMER CHEMICAL SOC
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/130569
专题	中国科学院金属研究所
通讯作者	Zhu, Yinlian; Ma, Xiuliang
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Jinzhai Rd 96, Hefei 230026, Anhui, Peoples R China 3.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China 4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Geng, Wanrong,Guo, Xiangwei,Zhu, Yinlian,et al. Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films[J]. ACS NANO,2018,12(11):11098-11105.
APA	Geng, Wanrong.,Guo, Xiangwei.,Zhu, Yinlian.,Tang, Yunlong.,Feng, Yanpeng.,...&Ma, Xiuliang.(2018).Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films.ACS NANO,12(11),11098-11105.
MLA	Geng, Wanrong,et al."Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films".ACS NANO 12.11(2018):11098-11105.