| 高温超导GdBa2Cu3O7-δ薄膜双晶晶界结特性研究 |
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| 引用本文： | 姚久胜,樊江水.高温超导GdBa2Cu3O7-δ薄膜双晶晶界结特性研究[J].光子学报,1998,27(3):223-227. |
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| 作者姓名： | 姚久胜 樊江水 |
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| 作者单位： | 中国科学院物理研究所国家超导实验室，西北大学物理系 |
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| 摘 要： | 在晶界夹角为24°的YSZ人工双晶基片上,采用原位直流磁控溅射法制备了高温超导双晶GdBa2Cu3O7-δ超导薄膜。采用光刻技术在晶界上刻出了尺寸5×5μm2的双晶晶界结。在77K下观测了结的直流I-V特性和在10GHz微波辐射下结的Shapiro台阶。这表明我们的人工双晶晶界结具有约瑟夫森弱连接行为。对结的特性进行了初步的理论分析和在实验基础上的数值模拟,模拟结果与RSJ理论符合较好,表明我们的双晶晶界结基本符合RSJ模型。
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| 关 键 词： | 高温超导体 双晶晶界结 I－V特性 约瑟夫森行为 |
| 收稿时间： | 1997-10-22 |
BICRYSTAL GRAIN BOUNDARY JUNCTIONS PROPERTY IN HIGH Tc SUPERCONDUCTING GdBa2Cu3O7-δ THIN FILMS |
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| Yao Jiusheng a,Fan Jiangshui b,Wang Ruilan a,Wan Fabao b,Li Hongcheng a a National Laboratory for Superconductivity.BICRYSTAL GRAIN BOUNDARY JUNCTIONS PROPERTY IN HIGH Tc SUPERCONDUCTING GdBa2Cu3O7-δ THIN FILMS[J].Acta Photonica Sinica,1998,27(3):223-227. |
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| Authors: | Yao Jiusheng a Fan Jiangshui b Wang Ruilan a Wan Fabao b Li Hongcheng a a National Laboratory for Superconductivity |
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| Institution: | Yao Jiusheng a),Fan Jiangshui b),Wang Ruilan a),Wan Fabao b),Li Hongcheng a) a) National Laboratory for Superconductivity,Institute of Physics,Chinese Academy of Sciences,Beijing,100080 b) Physics Department,Northwes |
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| Abstract: | The high Tc GdBa2Cu3O7-δ thin films have been grown on yttria stabilized zirconia (YSZ) artificial bicrystal substrates with misorientation of 24° by in situ dc magnetron sputtering deposition method.Grain boundary junctions were fabricated by the ordinary photolithography.The junctions were located just at the grain boundary of the substrate.The sizes of the junction is 5×5μm2.The I V characteristics and the Shapiro steps were measured under direct current and with 10GHz microwave irradiation,respectively.This measurement suggests that the bicrystal grain boundary junctions have Josephson weak link behaviour.On the base of experiment,the rudimentary theoretical analysis and the numerical fitting are performed.The fitting result indicates that the bicrystal grain junctions are close to the prediction of the resistively shunted junction(RSJ)type. |
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| Keywords: | High T c superconductor Bicrystal grain boundary junction I V characteristics Josephson behaviour |
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