Epitaxial growth of YBCO on Hastelloy with YSZ buffer layer by laser ablation

被引:21
作者
Jeong, YS [1 ]
Park, JH [1 ]
Lee, SY [1 ]
机构
[1] Yonsei Univ, Dept Elect Engn, Seoul 120749, South Korea
关键词
yttria-stabilized zirconia (YSZ); laser ablation; metallic substrates;
D O I
10.1016/S0040-6090(97)01186-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Good quality superconducting YBa2Cu3O7-delta(YBCO) thin films were grown on Hastelloy (Ni-Cr-Mo alloys) with yttria-stabilized zirconia (YSZ) buffer layers by in situ pulsed laser deposition in a multi-target processing chamber. Generally, Hastelloy exhibits excellent resistance to corrosion, fatigue, thermal shock, impact, and erosion. However, it is difficult to make films on flexible metallic substrates due to interdiffusion problems between metallic substrates and superconducting overlayers. To overcome this difficulty, it is necessary to use YSZ buffer layer since it will not only limit the interdiffusion process but also minimize the surface microcrack formation due to smaller mismatch between the film and the substrate. In order to enhance the crystallinity of YBCO films on metallic substrates, YSZ buffer layers were grown at various temperatures different from the deposition temperature of YBCO films. On YSZ buffer layer grown at higher temperature than that for depositing YBCO film, the YBCO thin film was found to be textured with c-axis orientation by X-ray diffraction and had a zero-resistance critical temperature of about 83 K. (C) 1998 Elsevier Science S.A.
引用
收藏
页码:262 / 264
页数:3
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