On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films
文献类型：期刊论文
| 作者 | K. Zhao ; Y. H. Huang ; H. B. Lu ; M. He ; K. J. Jin ; G. Z. Yang |
| 刊名 | Journal of Rare Earths
 |
| 出版日期 | 2005 |
| 卷号 | 23期号:5页码:526-529 |
| 关键词 | colossal magnetoresistance thin film photovoltaic effect microscopy rare earths molecular-beam epitaxy |
| ISSN号 | 1002-0721 |
| 中文摘要 | The anomalous photovoltaic effect was studied in epitaxial La0.8Sr0.2MnO3 films by laser molecular beam epitaxy. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than the film. Electron microdiffration and high-resolution imaging reveal that La0.8Sr0.2MnO3 thin film is epitaxially grown on the substrate, and the oriented microdomains run through the thickness of film, forming a columnar structure. Detailed investigations of the distribution of electric potential in the film surface with respect to the location of laser spot suggest that the anomalous photovoltaic response is due to an asymmetry of oriented microdomains in thin film. Under ultraviolet laser irradiation, the electron-hole pairs are excited in the manganese oxide film. The asymmetry of microdomains generates a built-in electric field and induces an asymmetric transport of the excited carriers, and hence a a photo voltage signal is obtained. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35264]  |
| 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 | K. Zhao,Y. H. Huang,H. B. Lu,et al. On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films[J]. Journal of Rare Earths,2005,23(5):526-529. |
| APA | K. Zhao,Y. H. Huang,H. B. Lu,M. He,K. J. Jin,&G. Z. Yang.(2005).On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films.Journal of Rare Earths,23(5),526-529. |
| MLA | K. Zhao,et al."On microscopic origin of photovoltaic effect in La0.8Sr0.2MnO3 films".Journal of Rare Earths 23.5(2005):526-529. |
入库方式： OAI收割
来源：金属研究所
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