High critical current density scheme of YBa2Cu3O7-x films by metalorganic deposition using trifluoroacetates

Takeshi Araki, Izumi Hirabayashi, Junko Shibata, Yuichi Ikuhara

研究成果: ジャーナルへの寄稿学術誌査読

29 被引用数 (Scopus)

抄録

The formation of CuO nanocrystallite in a precursor has little influence on the critical current density (Jc) of the YBa2Cu3O7-x (YBCO) film by the metalorganic deposition using trifluoroacetate. From the result of transmission electron microscopy, the microstructure of the YBCO film allows the coexistence of isolated CuO grains. Increasing humidity in the firing process is effective to decrease the grain growth of CuO nanocrystallite and attain high Jc of the films. We propose that a quasi-liquid is formed in a Cu-rich Y-Ba-O-F amorphous matrix and CuO/amorphous interface in the firing process with humidity. The quasi-liquid may help to diffuse H2O and HF in the film during the firing process, therefore, the removal of HF gas from the film surface is only a growth limiting process. Such a growth scheme leads to high Jc with high reproducibility.

本文言語英語
ページ(範囲)913-916
ページ数4
ジャーナルSuperconductor Science and Technology
15
6
DOI
出版ステータス出版済み - 6月 2002
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 材料化学
  • 電子工学および電気工学

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