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| On Microscopic Origin of Photovoltaic Effect in La0.8Sr0.2MnO3 Films | |
| 引用本文： | Lü Huibin. On Microscopic Origin of Photovoltaic Effect in La0.8Sr0.2MnO3 Films[J]. 中国稀土学报(英文版), 2005, 23(5): 526-529 |
| 作者姓名： | Lü Huibin |
| 作者单位： | Beijing National Laboratory for Condensed Matter Physics，Institute of Physics，Chinese Academy of Sciences，Beijing 100080，China，Department of Physics，Liaocheng University，Liaocheng 252059，China，International Center for Materials Physics，Chinese Academy of Sciences，Shenyang 110016，China)，Beijing National Laboratory for Condensed Matter Physics，Institute of Physics，Chinese Academy of Sciences，Beijing 100080，China，Beijing National Laboratory for Condensed Matter Physics，Institute of Physics，Chinese Academy of Sciences，Beijing 100080，China，Beijing National Laboratory for Condensed Matter Physics，Institute of Physics，Chinese Academy of Sciences，Beijing 100080，China，Beijing National Laboratory for Condensed Matter Physics，Institute of Physics，Chinese Academy of Sciences，Beijing 100080，China，Beijing National Laboratory for Condensed Matter Physics，Institute of Physics，Chinese Academy of Sciences，Beijing 100080，China |
| 基金项目： | 国家自然科学基金，the Research Foundation of Shandong Provincial Education Department of China，中国博士后科学基金 |
| 摘 要： | Theperovskitemanganitehavebeeninvestigated becauseoftheirinterestingpropertiesfullofvariety,includingferromagnetism,antiferromagnetism,metal insulatortransition,highTCsuperconductivity,colos salmagnetoresistanceandsoon,dependingonthe carrierconcentrationd… |
| 关 键 词： | 薄膜 光电效应 稀土 微观组织 |
| 文章编号： | 1002-0721（2005）05-0526-04 |
| 收稿时间： | 2005-03-04 |
| 修稿时间： | 2005-07-04 |
On Microscopic Origin of Photovoltaic Effect in La0.8Sr0.2MnO3 Films |
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| Zhao Kun,Huang Yanhong,He Meng,Jin Kuijuan,Yang Guozhen. On Microscopic Origin of Photovoltaic Effect in La0.8Sr0.2MnO3 Films[J]. Journal of Rare Earths, 2005, 23(5): 526-529 | |
| Authors: | Zhao Kun Huang Yanhong He Meng Jin Kuijuan Yang Guozhen |
| Abstract: | 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. |
| Keywords: | colossal magnetoresistance thin film photovoltaic effect microscopy rare earths |
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