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Microstructures and Superconductivities of LnBa2Cu3O7-x Thin Films

  • Toshiyuki Aida
  • Tokuumi Fukazawa
  • Akira Tsukamoto
  • Kazumasa Takagi
  • Teruho Shimotsu
  • Tsuneo Ichiguchi
Conference paper

Abstract

YBa2Cu3O7-x and ErBa2Cu3O7-x thin films are deposited on SrTiO3 and MgO single crystal substrates by rf-magnetron sputtering. YBa2Cu3Ob-x film is grown epitaxially on SrTiO3 substrate. ErBa2Cu3O7-x film is highly c-axis oriented perpendicular to MgO substrate. A lot of twins on a-b plane are observed by TEM. Jc seems to be affected by the subgrain defects rather than by the twin defects. The critical current dependency on the direction of applied magnetic field is also studied. Twin boundaries are thought not to be strong pinning centers of magnetic flux. Crystallographic anisotropy of oxygen-defect perovskite contributes to flux pinning.

Keywords

Basal Plane Oxide Superconductor Flux Pinning Ceramic Superconductor Crystallographic Anisotropy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Japan 1989

Authors and Affiliations

  • Toshiyuki Aida
    • 1
  • Tokuumi Fukazawa
    • 1
  • Akira Tsukamoto
    • 1
  • Kazumasa Takagi
    • 1
  • Teruho Shimotsu
    • 1
  • Tsuneo Ichiguchi
    • 1
  1. 1.Central Research LaboratoryHitachi, Ltd.Kokubunji, Tokyo, 185Japan

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