中国物理B ›› 2007, Vol. 16 ›› Issue (3): 799-804.doi: 10.1088/1009-1963/16/3/040

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The microwave response of MgB2/Al2O3 superconducting thin films

王云飞1, 柯于洋1, 张国华1, 罗胜1, 史力斌2, 张雪强3, 李春光3, 黎红3, 何豫生3, 于增强4, 王福仁4   

  1. (1)Department of Physics, School of Applied Science, University of Science and Technology Beijing, Beijing 100083, China; (2)Department of Physics, School of Applied Science, University of Science and Technology Beijing, Beijing 100083, China;Department of Physics, Bohai University, Jinzhou 121000, China ; (3)Institute of Physics, Chinese Academy of Sciences, Beijing 100080,China; (4)School of Physics, Peking University, Beijing 100871, China
  • 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10174006).

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)   

  1. 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
  • Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10174006).

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摘要： 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.

关键词: MgB2/2O3thin films, surface resistance, penetration depth, grain-size model

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.

Key words: MgB2/2O3 thin films, surface resistance, penetration depth, grain-size model

中图分类号: 

  • 74.25.Nf
68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 74.25.Ha (Magnetic properties including vortex structures and related phenomena) 74.78.-w (Superconducting films and low-dimensional structures)