Electrical properties of YBCO/Ca-YBCO/YBCO trilayer Josephson junctions using c-axis oriented films

被引：2
作者：
Wang, JQ
Maruyama, M
Ota, T
Terai, H
Inoue, M
Fujimaki, A
Hayakawa, H
机构：
[1] Department of Electronics, Nagoya University, Chikusa-ku Nagoya 464-01, Furo-cho
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期
关键词：
D O I：
10.1109/77.621928
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We have studied electrical properties of YBCO/Y0.7Ca0.3Ba2Cu3O7-x (Ca-YBCO)/YBCO trilayer junctions using c-axis oriented films, The Ca-YBCO films used here are the overdoped version of YBCO and show transition temperatures around 55K. All of the junctions show RSJ-like current- voltage characteristics in certain temperature range, though the range decreases with the Ca-YBCO interlayer thickness. For an applied magnetic field, the junctions show Fraunhofer pattern, indicating a Josephson coupling through the interlayers. The normal assistance of the junctions is proportional to the thickness of the interlayer, suggesting little interface resistance. The exponential dependence of the critical current on temperature and that on She interlayer thickness mean that the junctions behave as SNS junctions, These experimental results imply the proximity effect along c-axis in high temperature superconductors.
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页码：2948 / 2951
页数：4
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