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논문 기본 정보

자료유형
학술저널
저자정보
전병혁 (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute [KAERI]) 최준규 (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute [KAERI]) 정우영 (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute [KAERI], Korea University of Technology and Education) 이희균 (Korea Polytechnic University) 홍계원 (Korea Polytechnic University) 김찬중 (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute [KAERI])
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제7권 제2호
발행연도
2006.1
수록면
130 - 134 (5page)

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Buffer layers such as $CeO_2\;and\;Yb_2O_3$ films for YBCO coated conductors were deposited on (100) $SrTiO_3$ single crystals and (100) textured Ni substrates by a metal organic chemical vapor deposition (MOCVD) system of the hot-wall type. The substrates were moved with the velocity of 40 cm/hr. Source flow rate, $Ar/O_2$ flow rate and deposition temperature were main processing variables. The degree of film epitaxy and surface morphology were investigated using XRD and SEM, respectively. On a STO substrate, the $CeO_2$ film was well grown epitaxially above the deposition temperature of $450^{\circ}C$. However, on a Ni substrate, the XRD showed NiO (111) and (200) peaks due to Ni oxidation as well as (111) and (200) film growth. For the films deposited with $O_2$ gas as oxygen source, it was found that the NiO film was formed at the interface between the buffer layer and the Ni substrate. The NiO layer interrupts the epitaxial growth of the buffer layer. It seems that the epitaxial growth of the buffer layer on Ni metal substrates using $O_2$ gas is difficult. We are considering a new method avoiding Ni oxidation with $H_2O$ vapor instead of $O_2$ gas.

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