Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Effect of nano size $Y_2O_3$ addition on the superconducting properties and microstructure of YBCO thin film prepared by TFA-MOD method.

TFA-MOD 방법에 의한 YBCO 박막제조에서 nano size $Y_2O_3$ 첨가효과

  • 박진아 (한국산업기술대 에너지대학원) ;
  • 김병주 (한국산업기술대 에너지대학원) ;
  • 홍계원 (한국산업기술대 에너지대학원) ;
  • 이희균 (한국산업기술대 신소재공학과) ;
  • 유재무 (한국기계연구원 신기능재료연구본부) ;
  • 김영국 (한국기계연구원 신기능재료연구본부)
  • Published : 2006.09.01
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Abstract

The effect of the addition of the nano size $Y_2O_3$ powder on the microstructurte and superconducting properties of YBCO thin film deposited on LAO single crystalline substrate by TFA-MOD method was studied. Nano size $Y_2O_3$ powder was added to the stoichiometric precursor solution with a cation ratio of Y : Ba . Cu = 1 : 2 : 3 prepared using TFA as chelating agent. Precursor solutions with and without $Y_2O_3$ addition were coated on $LaAlO_3(100)$ single crystalline substrates by dip coating method. Calcination and conversion heat treatments were performed in controlled atmosphere containing moisture Current carrying capacity(Jc) of YBCO film was enhanced about 50% by $Y_2O_3$ doping and it is thought to be due to the better connectivity of YBCO grains and/or the flux pinning by the $Y_2O_3$ particles embedded in YBCO grains.

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References

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