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题名: Atomic structure and chemistry of a[100] dislocation cores in La2/3Sr1/3MnO3 films
作者: Song, Kepeng;  Du, Kui;  Ye, Hengqiang
发表日期: 2017-5-1
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.
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Recommended Citation:
Song, Kepeng,Du, Kui,Ye, Hengqiang. Atomic Structure And Chemistry Of A[100] Dislocation Cores In La2/3sr1/3mno3 Films[J]. Micron,2017,96:72-76.

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