Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Texture Development of CeO2 Buffer Layer and its Effect on Superconducting MOD-YBCO Films

CeO2 완충층의 결정성장 특성 및 금속 유기물 증착법으로 제조된 초전도 YBCO층에 미치는 영향

  • Chung, Kook Chae (Korea Institute of Materials Science) ;
  • Kim, Y.K. (Korea Institute of Materials Science) ;
  • Wang, X.L. (Institute for Superconducting and Electronic Materials, Univ. of Wollongong) ;
  • Dou, S.X. (Institute for Superconducting and Electronic Materials, Univ. of Wollongong)
  • 정국채 (한국기계연구원 부설 재료연구소 나노기능분말연구그룹) ;
  • 김영국 (한국기계연구원 부설 재료연구소 나노기능분말연구그룹) ;
  • ;
  • Received : 2009.06.23
  • Published : 2009.10.25
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Abstract

$CeO_2$ buffer layers have been deposited on YSZ single crystal substrates via a radio-frequency sputtering method. We focused on the texture development of $CeO_2$ with out-of-plane alignment and its effects on a superconducting YBCO layer, which was deposited by metal organic deposition. $CeO_2$ layers were grown epitaxially on single crystal YSZ substrates and subsequent YBCO layers were also grown epitaxially from $CeO_2$ layers. It was observed that the intensity of $CeO_2$(200) decreased with deposition temperature. ${\theta}-2{\theta}$ scan FWHM values of $CeO_2$(200) were inversely proportional to the peak intensities of $CeO_2$(200). The sample with the lowest $CeO_2$(200) intensity and poor out-of-plane alignment showed a strong reaction with the MOD-YBCO layer resulting in a thicker $BaCeO_3$ layer. The texture and superconducting property of the YBCO layer were affected indirectly by the formation of a $BaCeO_3$ layer at the interface between the $CeO_2$ and YBCO layers.

Keywords

Acknowledgement

Supported by : 국제과학기술협력재단

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