Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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MOD-processed YBCO coated conductors on the $CeO_2$-buffered IBAD-MgO template

  • Shin, G.M. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University) ;
  • Ko, R.K. (Superconducting Material Researck Group, Korea Electrotechnology Research Institute) ;
  • Oh, S.S. (Superconducting Material Research Group, Korea Electrotechnology Research Institute) ;
  • Moon, S.H. (Superconducting Material Research Group, Korea Electrotechnology Research Institute) ;
  • Yoo, S.I. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University)
  • Published : 2009.11.30
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Abstract

YBCO coated conductors (CC) on the $CeO_2$-buffered IBAD-MgO template were fabricated by metal-organic deposition (MOD) Process with Ba-trifluoroacetate and fluorine-free Y and Cu precursor materials. The precursor solution was coated on $CeO_2$-buffered IBAD MgO templates using the multiple dip-coating method, decomposed into inorganic precursors by pyrolysis up to $400^{\circ}C$ within 3 h, and finally fired at $740{\sim}800^{\circ}C$ in a reduced oxygen atmosphere. Microstructure, texture, and superconducting properties of YBCO films were found highly sensitive to both the firing temperature and time. The high critical current density ($J_C$) of $1.15\;MA/cm^2$ at 77.3K in the self-field could be obtained from $1\;{\mu}m$ thick YBCO CC, fired at $740^{\circ}C$ for 3.5 h, implying that high performance YBCO CC is producible on IBAD MgO template. Further enhancement of $J_C$ values is expected by improving the in-plane texture of $CeO_2$-buffer layer and avoiding the metal substrate contamination.

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References

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