Reconstruction of the La0.9Sr0.1MnO3-SrTiO3 interface by quantitative high-resolution electron microscopy

被引：2

作者：

Geuens, P ^{[1
]}

Lebedev, OI ^{[1
]}

Van Tendeloo, G ^{[1
]}

机构：

[1] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 116卷 / 12期

关键词：

surfaces and interfaces; epitaxy; scanning and transmission electron microscopy;

D O I：

10.1016/S0038-1098(00)00411-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Atomic displacements and interface reconstructions near a La0.9Sr0.1MnO3-SrTiO3 interface are studied by use of the focal reconstruction technique applied in high-resolution electron microscopy. By using a quantitative model, column positions are determined with high precision (better than 0.004 nm) by least-squares minimization. A displacement vector map and interatomic distances are calculated. From these a structure model for the interface is proposed. The interface has a facetted shape, where the interatomic distance is modulated. Possible local oxygen deficiency in SrTiO3 near the interface has been observed. (C) 2000 Elsevier Science Ltd. All rights reserved.

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页码：643 / 648

页数：6

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