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

doi:10.1021/acsnano.8b05449

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	Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films
	Geng, WR ; Guo, XW ; Zhu, YL ; Tang, YL ; Feng, YP ; Zou, MJ ; Wang, YJ ; Han, MJ ; Ma, JY ; Wu, B 1
刊名	ACS NANO
	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
DOI	10.1021/acsnano.8b05449
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.
学科主题	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
语种	英语
WOS记录号	WOS:000451789200049
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79839]
专题	金属研究所_中国科学院金属研究所
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, WR,Guo, XW,Zhu, YL,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, WR.,Guo, XW.,Zhu, YL.,Tang, YL.,Feng, YP.,...&Ma, XL.(2018).Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films.ACS NANO,12(11),11098-11105.
MLA	Geng, WR,et al."Rhombohedral-Orthorhombic Ferroelectric Morphotropic Phase Boundary Associated with a Polar Vortex in BiFeO3 Films".ACS NANO 12.11(2018):11098-11105.