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

文献类型：期刊论文

作者Geng, Wanrong1,4; Guo, Xiangwei1,4; Zhu, Yinlian1; Tang, Yunlong1; Feng, Yanpeng1,3; Zou, Minjie1,4; Wang, Yujia1; Han, Mengjiao1,3; Ma, Jinyuan1,2,4; Wu, Bo1,4
刊名ACS NANO
出版日期2018-11-01
卷号12期号:11页码:11098-11105
关键词BiFeO3 ferroelectric films vortices morphotropic phase boundary aberration-corrected scanning transmission electron microscopy first-principles calculations
ISSN号1936-0851
DOI10.1021/acsnano.8b05449
通讯作者Zhu, Yinlian(ylzhu@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn)
英文摘要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.
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
语种英语
WOS记录号WOS:000451789200049
出版者AMER CHEMICAL SOC
资助机构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
源URL[http://ir.imr.ac.cn/handle/321006/130568]  
专题金属研究所_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.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China
3.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China
4.Univ Sci & Technol China, Jinzhai Rd 96, Hefei 230026, Anhui, 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.

入库方式： OAI收割

来源：金属研究所

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