Atomic structure and chemistry of a[100] dislocation cores in La2/3Sr1/3MnO3 films

IMR OpenIR

	Atomic structure and chemistry of a[100] dislocation cores in La2/3Sr1/3MnO3 films
	Song, Kepeng; Du, Kui; Ye, Hengqiang; Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
	2017-05-01
发表期刊	MICRON
ISSN	0968-4328
卷号	96 页码:72-76
摘要	Oxide thin films with perovskite structures possess multifunctional properties, while defects in the films usually have significant influences on their physical properties. Here, the atomic structure and chemistry of a[100] dislocation cores in epitaxial La2/3Sr1/3MnO3 films were investigated by aberration-corrected scanning transmission electron microscopy combining with atomically resolved electron energy-loss spectroscopy imaging. The results demonstrated an edge dislocation terminated with Mn columns and significant nonstoichiometry at the dislocation core region. Quantitative analysis using core-loss spectrum indicates that La/Mn and O/Mn ratios are decreased at the dislocation core. Antisite defects with Mn ions at La-sites were directly determined at the dislocation cores with electron energy-loss spectroscopy. The structure of the dislocation core is discussed on the basis of high-angle annular dark-field imaging and electron energy loss spectroscopy results. (C) 2017 Elsevier Ltd. All rights reserved.; Oxide thin films with perovskite structures possess multifunctional properties, while defects in the films usually have significant influences on their physical properties. Here, the atomic structure and chemistry of a[100] dislocation cores in epitaxial La2/3Sr1/3MnO3 films were investigated by aberration-corrected scanning transmission electron microscopy combining with atomically resolved electron energy-loss spectroscopy imaging. The results demonstrated an edge dislocation terminated with Mn columns and significant nonstoichiometry at the dislocation core region. Quantitative analysis using core-loss spectrum indicates that La/Mn and O/Mn ratios are decreased at the dislocation core. Antisite defects with Mn ions at La-sites were directly determined at the dislocation cores with electron energy-loss spectroscopy. The structure of the dislocation core is discussed on the basis of high-angle annular dark-field imaging and electron energy loss spectroscopy results. (C) 2017 Elsevier Ltd. All rights reserved.
部门归属	[song, kepeng ; du, kui ; ye, hengqiang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
关键词	La2/3sr1/3mno3 Dislocation Stem Eels Antisite
学科领域	Microscopy
资助者	National Science Foundation of China [51521091, 51371177, 51390473]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78168
专题	中国科学院金属研究所
通讯作者	Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Song, Kepeng,Du, Kui,Ye, Hengqiang,et al. Atomic structure and chemistry of a[100] dislocation cores in La2/3Sr1/3MnO3 films[J]. MICRON,2017,96:72-76.
APA	Song, Kepeng,Du, Kui,Ye, Hengqiang,&Du, K .(2017).Atomic structure and chemistry of a[100] dislocation cores in La2/3Sr1/3MnO3 films.MICRON,96,72-76.
MLA	Song, Kepeng,et al."Atomic structure and chemistry of a[100] dislocation cores in La2/3Sr1/3MnO3 films".MICRON 96(2017):72-76.