DOI QR코드

DOI QR Code

Study on CeO2 Single Buffer on RABiTS for SmBCO coated Conductor

SmBCO 초전도 층착을 위한 RABiTS상의 CeO2 단일 버퍼 연구

  • 김태형 (한국전기연구원 초전도재료연구그룹) ;
  • 김호섭 (한국전기연구원 초전도재료연구그룹) ;
  • 이남진 (한국전기연구원 초전도재료연구그룹) ;
  • 하홍수 (한국전기연구원 초전도재료연구그룹) ;
  • 고락길 (한국전기연구원 초전도재료연구그룹) ;
  • 하동우 (한국전기연구원 초전도재료연구그룹) ;
  • 송규정 (한국전기연구원 초전도재료연구그룹) ;
  • 오상수 (한국전기연구원 초전도재료연구그룹) ;
  • 박경채 (경북대학교 금속신소재공학과)
  • Published : 2007.06.01

Abstract

As a rule, high temperature superconducting coated conductors have multi-layered buffers consisting of seed, diffusion barrier and cap layers. Multi-buffer layer deposition requires longer fabrication time. This is one of main reasons which increases fabrication cost. Thus, single buffer layer deposition seems to be important for practical coated conductor process. In this study, a single layered buffer deposition of $CeO_2$ for low cost coated conductors has been tried using thermal evaporation technique. 100 nm-thick $CeO_2$ layers deposited by thermal evaporation were found to act as a diffusion layer. $1\;{\mu}m-thick$ SmBCO superconducting layers were deposited by thermal co-evaporation on the $CeO_2$ buffered Ni-5%W substrate. Critical current of 90 A/cm was obtained for the SmBCO coated conductors.

References

  1. Y. Iijima, N. Tanabe, O. Kohno, and Y. Ikeno, 'In-plane aligned $YBa_2Cu_3O_{7-x} $ thin films deposited on polycrystalline metallic substrates', Appl. Phys. Lett., Vol. 60, p. 769, 1992 https://doi.org/10.1063/1.106514
  2. N. Martin and C. Rousselot, 'Use of a theoretical model to investigate RF and DC reactive sputtering of titanium and chromium oxide coatings', Surface and Coatings Technology, Vol. 110, p. 158, 1998 https://doi.org/10.1016/S0257-8972(98)00689-6
  3. T. J. Jackson, B. A. Glowacki, and J. E. Evetts, 'Oxidation thermodynamics of metal substrates during the deposition of buffer layr oxides', Physica C, Vol. 296, p. 215, 1998 https://doi.org/10.1016/S0921-4534(97)01841-8
  4. 김호섭, D. Shi, 고락길, 정준기, 하홍수, 송규 정, 박 찬, '초전도 테이프 제작을 위한 니켈기 판상의 산화물 박막증착' 전기전자재료학회논문지, 17권, 12호, p. 1356, 2004
  5. S. Lim, H. Kim, K. Chungm, B. Lee, and D. Youm, 'Comparative studies on the growth conditions of $CeO_2 andY_2O_3$ buffer layers on NiW tapes', Physica C, Vol. 384, p. 178, 2003 https://doi.org/10.1016/S0921-4534(02)01863-4