Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Angular dependence of critical current of SmBCO coated conductor fabricated by co-evaporation method

  • Kim, Ho-Sup (Korea Electrotechnology Research Institute) ;
  • Ha, Hong-Soo (Korea Electrotechnology Research Institute) ;
  • Oh, Sang-Soo (Korea Electrotechnology Research Institute) ;
  • Song, Kyu-Jeong (Korea Electrotechnology Research Institute) ;
  • Ko, Rock-Kil (Korea Electrotechnology Research Institute) ;
  • Ha, Dong-Woo (Korea Electrotechnology Research Institute) ;
  • Kim, Tae-Hyung (Korea Electrotechnology Research Institute) ;
  • Youm, Do-Jun (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Lee, Nam-Jin (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Moon, Seung-Hyun (Superconductor, Nano & Advanced Materials Corporation) ;
  • Yoo, Sang-Im (Department of Materials Science and Engineering, Seoul National University) ;
  • Park, Chan (Department of Materials Science and Engineering, Seoul National University)
  • Published : 2008.05.31
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Abstract

Angular dependence of critical current density of SmBCO coated conductor fabricated by co-evaporation method was investigated. For comparison, three samples were fabricated by a co-evaporation method and one sample was fabricated by a pulsed laser deposition process. The deposition system, named EDDC (Evaporation using Drum in Dual Chambers), is a batch type co-evaporation system, which is composed of reaction chamber and evaporation chamber. The normalized critical current density ratio ($I_c/I_c$(H//ab-plane)) of EDDC-SmBCO samples was found to be higher than that of PLD-YBCO sample in the whole range of angle. While the EDDC-SmBCO samples evidently had a peak at the angle of H//c-axis in the plot of the angular dependence of critical current, the normalized critical current of PLD-YBCO sample decreased monotonically without any peak as angle increased. The field dependence of critical current under the magnetic field parallel to the normal direction of those samples showed similar aspect in the range of $0\;G{\sim}5000\;G$.

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References

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