Thickness Dependence of Oxygen Vacancy Ordering in Strained LaCoO(3-x )Thin Films

doi:10.1021/acs.jpcc.0c02545

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	Thickness Dependence of Oxygen Vacancy Ordering in Strained LaCoO(3-x )Thin Films
	Zhang, Ningbin 1,3; Tian, Xianhui 1,3; Zhu, Yinlian 3; Wang, Yujia 3; Tang, Yunlong 3; Zou, Minjie 1,3; Ma, Jinyuan 2,3; Feng, Yanpeng 3,4; Geng, Wanrong 1,3; Cao, Yi 1,3
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2020-06-11
卷号	124 期号:23 页码:12492-12501
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.0c02545
通讯作者	Zhu, Yinlian(ylzhu@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn)
英文摘要	The physical properties of perovskite oxides are very sensitive to oxygen vacancy structures, and an unambiguous acquaintance of vacancy structures of thin films is the precondition for applications of many functional devices. Here, we report critical thickness control over oxygen vacancy ordering structure in epitaxial LaCoO3-x (LCO) thin films characterized by atomic resolution scanning transmission electron microscopy (STEM). Lattice mappings extracted from Cs-corrected STEM images demonstrate that vacancy ordering planes are vertically distributed in LCO films grown on SrTiO3 substrates with the thickness above 5 nm, transversally distributed when the thickness is below 5 nm and distributed in a mixed manner when the thickness is 5 nm. Similar phenomenon also happens in LCO/NdGaO3 film systems with the critical thickness of around 13 nm due to the reduced tensile strain imposed by the substrate. The thickness effect phenomenon is collaborated by first-principles calculations and the formation mechanism is discussed from the point of view of strain relaxation. These findings demonstrate that the thickness can exquisitely control the periodic modulations of vacancy ordering structure in LCO thin films, suggesting an effective pathway of thickness controlling and enhancing physical properties of functional oxide films.
资助项目	Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; National Natural Science Foundation of China[51971223] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51922100] ; 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] ; Youth Innovation Promotion Association CAS[2016177]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000541745800035
资助机构	Key Research Program of Frontier Sciences CAS ; National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139416]
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.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ningbin,Tian, Xianhui,Zhu, Yinlian,et al. Thickness Dependence of Oxygen Vacancy Ordering in Strained LaCoO(3-x )Thin Films[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2020,124(23):12492-12501.
APA	Zhang, Ningbin.,Tian, Xianhui.,Zhu, Yinlian.,Wang, Yujia.,Tang, Yunlong.,...&Ma, Xiuliang.(2020).Thickness Dependence of Oxygen Vacancy Ordering in Strained LaCoO(3-x )Thin Films.JOURNAL OF PHYSICAL CHEMISTRY C,124(23),12492-12501.
MLA	Zhang, Ningbin,et al."Thickness Dependence of Oxygen Vacancy Ordering in Strained LaCoO(3-x )Thin Films".JOURNAL OF PHYSICAL CHEMISTRY C 124.23(2020):12492-12501.