HIGH-T-c SUPERCONDUCTING EuBa2Cu3Oy THIN FILMS ON MgO AND YAlO3 FOR COPLANAR DEVICES

被引：4
作者：
Asano, H. [1 ]
Satoh, M. [1 ]
Konaka, T. [1 ]
机构：
[1] NTT Labs, Tokai, Ibaraki 31911, Japan
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期
关键词：
D O I：
10.1109/77.234028
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 the microwave properties of high-T-c superconducting EuBa2Cu3Oy (EBCO) films on MgO and YAlO3 substrates with low dielectric constants (epsilon=10 and 16, respectively), and a low loss tangent (tan delta<10(-5)). Measurements of surface resistance R-s at 50 GHz in a cavity show that EBCO films exhibit low R-s values (77 K) of 2-10 m Omega. A microstructural study using transmission electron microscopy (TEM) showed that crystal defects related to the in-plane misorientation are observed for films with higher Rs values. The R-s values of the patterned films were measured in a coplanar transmission line resonator. Typical value of patterned films was 28 mu Omega, at 4 GHz and 28 K.
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收藏
页码：2975 / 2978
页数：4
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