Anisotropic strain: A critical role in domain evolution in (111)-Oriented ferroelectric films

doi:10.1016/j.actamat.2019.01.005

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	Anisotropic strain: A critical role in domain evolution in (111)-Oriented ferroelectric films
	Zou, M. J.2,4; Tang, Y. L.4; Zhu, Y. L.4; Feng, Y. P.3,4; Wang, Y. J.4; Han, M. J.3,4; Zhang, N. B.2,4; Ma, J. Y.2,4; Wu, B.2,4; Ma, X. L.1,4
刊名	ACTA MATERIALIA
	2019-03-01
卷号	166 页码:503-511
关键词	Ferroelectric PbTiO3 Perovskites T Piezoresponse force microscopy Transmission electron microscopy
ISSN号	1359-6454
DOI	10.1016/j.actamat.2019.01.005
通讯作者	Zhu, Y. L.(ylzhu@imr.ac.cn)
英文摘要	Domain behavior of (111)- oriented perovskite ferroelectric films is significantly different from (001)-/(101)- oriented ones, resulting in enhancing property responses such as a superior susceptibility and a reduced coercive field. However, the domain structures and evolutions with the thickness of (111)-oriented ferroelectric films, which are crucial to further understand the distinctive properties, are still obscure. In this study, the ferroelectric domains of (111)- oriented PbTiO3 films are investigated by transmission electronic microscopy (TEM) and piezoresponse force microscopy (PFM). We identify the domain evolution with the film thicknesses under anisotropic strains imposed by the orthorhombic GdScO3 (101)(O) substrates. Contrast analysis and electron diffraction patterns reveal that only four ferroelectric variants evolve in PTO films: d(2)(+), d(2)(-), d(3)(+) and d(3)(-), with the polarization directions along [010], [0 (1) over bar0], [001] and [00 (1) over bar], respectively. Two kinds of domain walls are formed: "inclined" (011) domain walls for d(2)(-)/d(3)(+) (d(2)(+)/d(3)(-)) domains, "normal" (01 (1) over bar) domain walls for d(2)(-)/d(3)(+) (d(2)(+)/d(3)(-)) domains. The width of periodically distributed d(2)(+)/d(3)(+)(d(2)(-)/d(3)(-)) domains increases with film thickness following the square root rule. Aberration-corrected scanning transmission electronic microscopy demonstrates the lattice characteristics of domains in (111)- oriented PbTiO3 films are consistent with tetragonal ferroelectric domains. PFM studies reveal that both the out-of-plane and in-plane polarization components of d(2)(-)/d(3)(+) (d(2)(+)/d(3)(-)) domains are non-identical, whereas the d(2)(+)/d(3)(+) (d(2)(-)/d(3)(-)) domains possess uniform out-of-plane polarization component and non-uniform in-plane polarization component. This study discloses the domain structure in (111)- oriented tetragonal ferroelectric films under anisotropic strains and the association with the ferroelectric properties. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[51571197] ; National Natural Science Foundation of China[51501194] ; 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	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000459358200044
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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/131928]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhu, Y. L.
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zou, M. J.,Tang, Y. L.,Zhu, Y. L.,et al. Anisotropic strain: A critical role in domain evolution in (111)-Oriented ferroelectric films[J]. ACTA MATERIALIA,2019,166:503-511.
APA	Zou, M. J..,Tang, Y. L..,Zhu, Y. L..,Feng, Y. P..,Wang, Y. J..,...&Ma, X. L..(2019).Anisotropic strain: A critical role in domain evolution in (111)-Oriented ferroelectric films.ACTA MATERIALIA,166,503-511.
MLA	Zou, M. J.,et al."Anisotropic strain: A critical role in domain evolution in (111)-Oriented ferroelectric films".ACTA MATERIALIA 166(2019):503-511.