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논문 기본 정보

자료유형
학술저널
저자정보
최준규 (Korea Atomic Energy Research Institute) 김민우 (Korea Atomic Energy Research Institute, Chungnam National University) 전병혁 (Korea Atomic Energy Research Institute) 이희균 (Korea Polytechnic University) 홍계원 (Korea Polytechnic University) 김찬중 (Korea Atomic Energy Research Institute)
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제7권 제1호
발행연도
2005.1
수록면
69 - 76 (8page)

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Complex single buffer composed of yttrium and samarium oxide was deposited on the metallic substrates by MOCVD (metal organic chemical vapor deposition) method using single liquid source. Two different types of the substrates with in-plane textures of about $8{\sim}10$ degree of Ni and $3at.\%W-Ni$ alloy were used. Y(tmhd: 2,2,6,6-tetramethyl-3,5-heptane dionate)$_3$:Sm(tmhd)$_3$ of liquid source was adjusted to 0.4:0.6 to minimize the lattice mismatch between the complex single buffer and the YBCO. The epitaxial growth of $(Y_{x}Sm_{1-x})_{2}O_3$ was achieved at the temperature higher than $500^{\circ}C$ in $O_2$ atmosphere. However, it was found that the formation of NiO accelerated with increasing deposition temperature. By supplying $H_{2}O$ vapor, this oxidation of the substrate could be suppressed throughout the deposition temperatures. We could get the epitaxial growth on pure Ni substrate without the formation of NiO. The competitive (222) and (400) growths were observed at the deposition temperatures of $650\~750^{\circ}C$, but the (400) growth became dominant above $800^{\circ}C$. The $(Y_{x}Sm_{1-x})_{2}O_3$-buffered metallic substrates can be used as the buffer for YBCO coated conductor.

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