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In-Situ Observation of Bubbles in Superconductor YBa2Cu3O7-δ Materials During He Ion Irradiation in an Electron Microscope

  • Shigemi Furuno
  • Kiichi Hojou
  • Hiroshi Maeta
  • Hitoshi Otsu
  • Mitsuo Watanabe
Conference paper

Abstract

In-situ observation of formation and growth of bubbles in superconductor YBa2Cu3O7-δ materials during 10 keV He ion irradiation was carried out using a transmission electron microscope. Irradiations were performed inside the electron microscope linked with an ion gun at room temperature. The images on the fluorescent screen were recorded by VTR. The small bubbles were observed at the fluence of 9x1016 ions/cm2. These bubbles increased in number and continued to grow, as the irradiation proceeded. At the fluence of 3x1017 ions/cm2 bubbles began to coalesce with each other, followed by blisters and exfoliation. New bubbles were formed underneath, grew and coalesced. Preferential formation and growth of He bubbles at crystal grain boundary were found during the irradiations. It was also found that amorphization of YBa2Cu3O7-δ crystals occurred as the irradiation proceeded.

Keywords

Observation System Helium Bubble Japan Atomic Energy Research Institute Denude Zone Fluorescent Screen 
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

  • Shigemi Furuno
    • 1
  • Kiichi Hojou
    • 1
  • Hiroshi Maeta
    • 2
  • Hitoshi Otsu
    • 1
  • Mitsuo Watanabe
    • 2
  1. 1.Department of ChemistryJapan Atomic Energy Research InstituteTokai-mura, Ibaraki, 319-11Japan
  2. 2.Department of PhysicsJapan Atomic Energy Research InstituteTokai-mura, Ibaraki, 319-11Japan

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