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 | Wang, X ; Zhu, YL ; Mi, SB ; Wang, C ; Lu, HB ; Ma, XL |
| 刊名 | PHILOSOPHICAL MAGAZINE
 |
| 出版日期 | 2010 |
| 卷号 | 90期号:34页码:4551 |
| 关键词 | HETEROSTRUCTURES NANOSTRUCTURES |
| ISSN号 | 1478-6435 |
| 通讯作者 | Zhu, YL: Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China. |
| 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. |
| 收录类别 | SCI |
| 资助信息 | National Basic Research Program of China [2009CB623705]; National Natural Science Foundation of China [50871115, 10874226] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/42324]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, X,Zhu, YL,Mi, SB,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. |
| APA | Wang, X,Zhu, YL,Mi, SB,Wang, C,Lu, HB,&Ma, XL.(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. |
| MLA | Wang, X,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. |
入库方式： OAI收割
来源：物理研究所
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