Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Deposition of YBCO/BaZrO$_3$ films on MgO single crystal substrates by pulsed laser deposition

펄스레이저법으로 MgO 단결정 기판위에 YBCO/BaZrO$_3$ 박막의 증착

  • 정준기 (한국전기연구원 초전도재료연구그룹) ;
  • 고락길 (한국전기연구원 초전도재료연구그룹) ;
  • 김호섭 (한국전기연구원 초전도재료연구그룹) ;
  • 하홍수 (한국전기연구원 초전도재료연구그룹) ;
  • 송규정 (한국전기연구원 초전도재료연구그룹) ;
  • 문승현 (서울대학교 재료공학부) ;
  • 유상임 (서울대학교 재료공학부) ;
  • 김철진 (경상대학교 재료공학부) ;
  • 박찬 (한국전기연구원 초전도재료연구그룹)
  • Published : 2004.09.01
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Abstract

There are two major approaches to obtain texture template for HTS coated conductor (CC) ---IBAD and RABiTS. CC's with IBAD template showed both longer and higher Ic results so far. IBAD for CC began with YSZ, the processing of which is very slow compared to other processings needed for the fabrication of CC. Because of this very slow processing speed, IBAD with other materials such as Gd$_2$Zr$_2$O$_{7}$(GZO) and MgO have been developed. The processings of IBAD-GZO and IBAD-MgO are known to be up to 3times and 100 times. respectively, as fast as the processing of IBAD-YSZ. IBAD-MgO is very attractive in that the processing is very fast. IBAD-MgO also needs additional buffer layer(s). Many materials are being investigated to be used as a buffer layer on top of the MgO. BaZrO$_3$ (BZO) is a good candidate as the buffer layer on top of the IBAD-MgO because it is chemically stable and does not react with YBCO at high temperatures. It also has good lattice match with MgO. The BZO film has been deposited on single crystal MgO, and YBCO film was deposited on BZO/MgO to investigate the possibility of using BZO as both the buffer and capping layer of the CC.C.

Keywords

References

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