Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3- x Thin Films

doi:10.1021/acsami.8b13674

	Oxygen Vacancy Ordering Modulation of Magnetic Anisotropy in Strained LaCoO3- x Thin Films
	Zhang, Ningbin 1,2; Zhu, Yinlian 2; Li, Da 2; Pan, Desheng 1,2; Tang, Yunlong 2; Han, Mengjiao 2; Ma, Jinyuan 2,3; Wu, Bo 1,2; Zhang, Zhidong 2; Ma, Xiuliang 2,3
刊名	ACS Applied Materials and Interfaces
	2018-11-07
卷号	10 期号:44 页码:38230-38238
关键词	High resolution transmission electron microscopy Lanthanum compounds Magnetic anisotropy Magnetism Oxygen Perovskite Perovskite solar cells Pulsed laser deposition Scanning electron microscopy Strain Tensile strain Thin films Transmission electron microscopy X ray photoelectron spectroscopy Aberration-corrected STEM Anisotropy field Oxygen vacancy concentration Oxygen vacancy orderings Preferred orientations Scanning transmission electron microscopy Temperature-dependent magnetizations Vacancy concentration
ISSN号	19448244
DOI	10.1021/acsami.8b13674
英文摘要	Oxygen 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 X-ray 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. © Copyright 2018 American Chemical Society.
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	American Chemical Society
WOS记录号	WOS:000449887600053
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114815]
专题	材料科学与工程学院材料科学与工程学院_特聘教授组
作者单位	1.School of Material Science and Engineering, University of Science and Technology of China, Hefei; 230026, China; 2.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, Shenyang; 110016, China; 3.State Key Lab of Advanced Processing and Recycling on Non-ferrous Metals, Lanzhou University of Technology, Langongping Road 287, Lanzhou; 730050, China
推荐引用方式 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 and 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 and 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 and Interfaces 10.44(2018):38230-38238.