Morphology and orientation of iron oxide precipitates in epitaxial BiFeO3 thin films grown under two non-optimized oxygen pressures
文献类型：期刊论文
| 作者 | X. Wang ; Y. L. Zhu ; S. B. Mi ; C. Wang ; H. B. Lu ; X. L. Ma |
| 刊名 | Philosophical Magazine
 |
| 出版日期 | 2010 |
| 卷号 | 90期号:34页码:4551-4567 |
| 关键词 | transmission electron microscopy bismuth ferrite multiferroic film secondary phase microstructure heterostructures nanostructures |
| ISSN号 | 1478-6435 |
| 中文摘要 | Microstructures of multiferroic BiFeO3 thin films epitaxially grown on SrRuO3-buffered SrTiO3 (001) substrates by laser molecular-beam epitaxy under two non-optimized oxygen pressures were characterized by means of transmission electron microscopy. The results showed that the films grown under oxygen pressures of 1 Pa and 0.3 Pa contain a secondary phase embedded in the BiFeO3 matrix. High-angle annular dark-field imaging, elemental mapping and composition analysis in combination with selected area electron diffraction revealed that the parasitic phase is mainly antiferromagnetic -Fe2O3. The -Fe2O3 particles are semi-coherently embedded in the BiFeO3 films, as confirmed by high-resolution transmission electron microscopy. In addition to the -Fe2O3 phase, ferromagnetic Fe3O4 precipitates were found in the BiFeO3 films grown under 0.3 Pa and shown to accumulate in areas near the film/substrate interfaces. In our heteroepitaxy systems, very low density misfit dislocations were observed at the interfaces between the BiFeO3 and SrRuO3 layers implying that their misfit strains may be relieved by the formation of the secondary phases. Using X-ray photoelectron spectroscopy it was found that Fe exists in the +3 oxidation state in these films. The possible formation mechanisms of the secondary phases are discussed in terms of film growth conditions. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31522]  |
| 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 | X. Wang,Y. L. Zhu,S. B. Mi,et al. Morphology and orientation of iron oxide precipitates in epitaxial BiFeO3 thin films grown under two non-optimized oxygen pressures[J]. Philosophical Magazine,2010,90(34):4551-4567. |
| APA | X. Wang,Y. L. Zhu,S. B. Mi,C. Wang,H. B. Lu,&X. L. Ma.(2010).Morphology and orientation of iron oxide precipitates in epitaxial BiFeO3 thin films grown under two non-optimized oxygen pressures.Philosophical Magazine,90(34),4551-4567. |
| MLA | X. Wang,et al."Morphology and orientation of iron oxide precipitates in epitaxial BiFeO3 thin films grown under two non-optimized oxygen pressures".Philosophical Magazine 90.34(2010):4551-4567. |
入库方式： OAI收割
来源：金属研究所
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