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

Takeshi Araki, Izumi Hirabayashi, Junko Shibata, Yuichi Ikuhara

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29 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)913-916
Number of pages4
JournalSuperconductor Science and Technology
Volume15
Issue number6
DOIs
Publication statusPublished - Jun 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering

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