Misfit dislocations of anisotropic magnetoresistant Nd0.45Sr0.55MnO3 thin films grown on SrTiO3 (110) substrates
文献类型：期刊论文
| 作者 | Y. L. Tang ; Y. L. Zhu ; H. Meng ; Y. Q. Zhang ; X. L. Ma |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2012 |
| 卷号 | 60期号:17页码:5975-5983 |
| 关键词 | High resolution (scanning) transmission electron microscopy Misfit dislocations Perovskite oxides Misfit relaxation perovskite films nd1-xsrxmno3 transition evolution |
| ISSN号 | 1359-6454 |
| 中文摘要 | Nd0.45Sr0.55MnO3 is an A-type antiferromagnetic manganite showing obvious angular-dependent magnetoresistance, which can be tuned by misfit strain. The misfit strain relaxation of Nd0.45Sr0.55MnO3 thin films is of both fundamental and technical importance. In this paper, microstructures of epitaxial Nd0.45Sr0.55MnO3 thin films grown on SrTiO3 (110) substrates by pulsed laser deposition were investigated by means of (scanning) transmission electron microscopy. The Nd0.45Sr0.55MnO3 thin films exhibit a two-layered structure: a continuous perovskite layer epitaxial grown on the substrate followed by epitaxially grown columnar nanostructures. An approximately periodic array of misfit dislocations is found along the interface with line directions of both < 111 > and [001]. High-resolution (scanning) transmission electron microscopy reveals that all the misfit dislocations possess a < 110 >-type Burgers vectors. A formation mechanism based on gliding or climbing of the dislocations is proposed to elucidate this novel misfit dislocation configuration. These misfit dislocations have complex effects on the strain relaxation and microstructure of the films, and thus their influence needs further consideration for heteroepitaxial perovskite thin film systems, especially for films grown on substrates with low-symmetry surfaces such as SrTiO3 (110) and (111), which are attracting attention for their potentially new functions. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60260]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Y. L. Tang,Y. L. Zhu,H. Meng,et al. Misfit dislocations of anisotropic magnetoresistant Nd0.45Sr0.55MnO3 thin films grown on SrTiO3 (110) substrates[J]. Acta Materialia,2012,60(17):5975-5983. |
| APA | Y. L. Tang,Y. L. Zhu,H. Meng,Y. Q. Zhang,&X. L. Ma.(2012).Misfit dislocations of anisotropic magnetoresistant Nd0.45Sr0.55MnO3 thin films grown on SrTiO3 (110) substrates.Acta Materialia,60(17),5975-5983. |
| MLA | Y. L. Tang,et al."Misfit dislocations of anisotropic magnetoresistant Nd0.45Sr0.55MnO3 thin films grown on SrTiO3 (110) substrates".Acta Materialia 60.17(2012):5975-5983. |
入库方式： OAI收割
来源：金属研究所
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