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Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films
Zhang, Ningbin1,2; Zhu, Yinlian1; Li, Da1; Pan, Desheng1,2; Tang, Yunlong1; Han, Mengjiao1; Ma, Jinyuan1,3; Wu, Bo1,2; Zhang, Zhidong1; Ma, Xiuliang1,3
Corresponding AuthorZhu, Yinlian(ylzhu@imr.ac.cn)
2018-11-07
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume10Issue:44Pages:38230-38238
AbstractOxygen vacancy configurations and concentration are coupled with the magnetic, electronic, and transport properties of perovskite oxides, and manipulating the physical properties by tuning the vacancy structures of thin films is crucial for applications in many functional devices. In this study, we report a direct atomic resolution observation of the preferred orientation of vacancy ordering structure in the epitaxial LaCoO3-x (LCO) thin films under various strains from large compressive to large tensile strain utilizing scanning transmission electron microscopy (STEM). Under compressive strains, the oxygen vacancy ordering prefers to be along the planes parallel to the heterointerface. Changing the strains from compressive to tensile, the oxygen vacancy planes turn to be perpendicular to the heterointerface. Aberration-corrected STEM images, electron diffractions, and Xray diffraction combined with X-ray photoelectron spectroscopy demonstrate that the vacancy concentration increases with increasing misfit strains and vacancy distribution is more ordered and homogeneous. The temperature-dependent magnetization curves show the Curie temperature increases, displaying a positive correlation with the misfit strains. With change in the strain from compressive to tensile, anisotropy fields vary and show large values under tensile strains. It is proposed that oxygen vacancy concentration and preferred ordering planes are responsible for the enhanced magnetic properties of LCO films. Our results have realized a controllable preparation of oxygen vacancy ordering structures via strains and thus provide an effective method to regulate and optimize the physical properties such as magnetic properties by strain engineering.
KeywordLaCoO3-x thin film oxygen vacancy strain anisotropy field pulsed laser deposition transmission electron microscopy
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China ; Key Research Program of Frontier Sciences CAS
DOI10.1021/acsami.8b13674
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51571197] ; National Natural Science Foundation of China[51501194] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51401212] ; National Natural Science Foundation of China[51521091] ; National Basic Research Program of China[2014CB921002] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010]
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000449887600053
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/130375
Collection中国科学院金属研究所
Corresponding AuthorZhu, Yinlian
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Ningbin,Zhu, Yinlian,Li, Da,et al. Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(44):38230-38238.
APA Zhang, Ningbin.,Zhu, Yinlian.,Li, Da.,Pan, Desheng.,Tang, Yunlong.,...&Ma, Xiuliang.(2018).Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films.ACS APPLIED MATERIALS & INTERFACES,10(44),38230-38238.
MLA Zhang, Ningbin,et al."Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3-x Thin Films".ACS APPLIED MATERIALS & INTERFACES 10.44(2018):38230-38238.
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