Anisotropy and Lorentz-Force Dependences of Critical Current Density in C-Axis-Oriented YBa2Cu3O7-δ Thin Film

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  • Horide Tomoya
    Department of Materials Science and Engineering, Kyoto University CREST, Japan Science and Technology Agency
  • Matsumoto Kaname
    Department of Materials Science and Engineering, Kyoto University CREST, Japan Science and Technology Agency
  • Yoshida Yutaka
    Department of Energy Engineering and Science, Nagoya University CREST, Japan Science and Technology Agency
  • Mukaida Masashi
    Department of Electrical and Information Engineering, Yamagata University CREST, Japan Science and Technology Agency
  • Ichinose Ataru
    Central Research Institute of Electric Power Industry CREST, Japan Science and Technology Agency
  • Horii Shigeru
    Department of Superconductivity, University of Tokyo CREST, Japan Science and Technology Agency
  • Osamura Kozo
    Department of Materials Science and Engineering, Kyoto University

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タイトル別名
  • Anisotropy and Lorentz-Force Dependences of Critical Current Density in C-Axis-Oriented YBa2Cu3O7-.DELTA. Thin Film
  • Anisotropy and Lorentz Force Dependences of Critical Current Density in C Axis Oriented YBa2Cu3O7 デルタ Thin Film
  • Anisotropy and Lorentz-Force Dependences of Critical Current Density in C-Axis-Oriented YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> Thin Film

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The magnetic field angular dependence of Jc(θ) for a c-axis-oriented YBa2Cu3O7−δ (YBCO) thin film was measured using both constant and variable Lorentz force configurations. When the field was tilted from the c-axis within ±30°, Jc(θ) was independent of the intensity of the Lorentz force. This demonstrates that the vortices have bent segments trapped by pinning centers that extend parallel to the c-axis, and Jc(θ) is limited by the depinning of these segments. The effect on Jc(θ) of the two types of pinning centers, i.e., either parallel to the c-axis or to the ab plane, should be considered when the field is tilted from the ab plane within ±30°.

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