The microwave response of MgB2/Al2O3 superconducting thin films
Shi Li-Bin(史力斌)a)b)†, Wang Yun-Fei(王云飞)a), Ke Yu-Yang(柯于洋)a), Zhang Guo-Hua(张国华)a), Luo Sheng(罗胜)a), Zhang Xue-Qiang(张雪强)c), Li Chun-Guang(李春光)c), Li Hong(黎红)c), He Yu-Sheng(何豫生)c), Yu Zeng-Qiang(于增强)d), and Wang Fu-Ren(王福仁)d)
a Department of Physics, School of Applied Science, University of Science and Technology Beijing, Beijing 100083, China; b Department of Physics, Bohai University, Jinzhou 121000, China ; c Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; d School of Physics, Peking University, Beijing 100871, China
Abstract Microwave characteristics of MgB2/2O3 superconducting thin films were investigated by coplanar resonator technique. The thin films studied have different grain sizes resulting from different growth techniques. The experimental results can be described very well by a grain-size model which combines coplanar resonator theory and Josephson junction network model. It was found that the penetration depth and surface resistance of thin films with smaller grain sizes are larger than those of thin films with larger grain sizes.
(Superconducting films and low-dimensional structures)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10174006).
Cite this article:
Shi Li-Bin(史力斌), Wang Yun-Fei(王云飞), Ke Yu-Yang(柯于洋), Zhang Guo-Hua(张国华), Luo Sheng(罗胜), Zhang Xue-Qiang(张雪强), Li Chun-Guang(李春光), Li Hong(黎红), He Yu-Sheng(何豫生), Yu Zeng-Qiang(于增强), and Wang Fu-Ren(王福仁) The microwave response of MgB2/Al2O3 superconducting thin films 2007 Chinese Physics 16 799
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