| La0.67Ca0.33MnO3薄膜皮秒光电效应 |
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| 引用本文： | 赵昆,丰家峰,黄延红,黄康权. La0.67Ca0.33MnO3薄膜皮秒光电效应[J]. 中国物理, 2005, 14(2): 398-403 |
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| 作者姓名： | 赵昆 丰家峰 黄延红 黄康权 |
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| 作者单位： | Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China;State Key Laboratory for Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Department of Physics, The Chinese University of Hong Kong, Hong Kong, China |
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| 基金项目： | Project supported by the Hong Kong Research Grant Council and the National Natural Science Foundation of China (Grant Nos 50371102 and 10334070). |
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| 摘 要： | 在1064 nm波长脉冲激光（脉宽25 ps）的照射下，钙钛矿氧化物薄膜La0.67Ca0.33MnO3/SrTiO3具有超快光电效应，对激光脉冲显示ps量级的响应时间，上升沿响应时间300 ps，半高宽700 ps，同时，对激光能量的响应灵敏度为500 mV/mJ。
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| 关 键 词： | :锰氧化物；薄膜；光电效应 |
| 收稿时间： | 2003-12-23 |
Magnetotransport properties of La2/3Ca1/3MnO3/YBa2Cu4O8/La2/3Ca1/3MnO3 sandwiches |
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| Zhao Kun,Feng Jia-Feng,Huang Yan-Hong and Wong Hong-Kuen. Magnetotransport properties of La2/3Ca1/3MnO3/YBa2Cu4O8/La2/3Ca1/3MnO3 sandwiches[J]. Chinese Physics, 2005, 14(2): 398-403 |
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| Authors: | Zhao Kun Feng Jia-Feng Huang Yan-Hong Wong Hong-Kuen |
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| Abstract: | La2/3Ca1/3MnO3(LCMO)/YBa2Cu4O8(YBCO)/LCMO sandwiches are prepared by the facing-target sputtering technique. The superconducting transition temperature as a function of spacer layer thickness is described by the magnetic proximity effect in the superconductor/ferromagnet structure. The metal—semiconductor transition temperature exhibits a nonmonotonic behaviour which is strongly dependent upon the YBCO layer thickness, and is also shown from the measurement of resistance and magnetoresistance. These results imply that the magnetic spin interaction between the two LCMO layers may occur through the normal-conductive YBCO layer. |
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| Keywords: | colossal magnetoresistance high temperature superconductivity magnetic properties |
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