MILLIMETER-WAVE SURFACE-RESISTANCE OF EUBA2CU3O7-Y FILM ON MGO SUBSTRATES

被引:6
作者
KONAKA, T [1 ]
SATO, M [1 ]
ASANO, H [1 ]
机构
[1] OPTOELECTR LABS, TOKAI, IBARAKI 31911, JAPAN
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1990年 / 29卷 / 04期
关键词
High frequency; High transition temperature; Superconducting oxide; Surface resistance; Thin film;
D O I
10.1143/JJAP.29.L569
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have measured the surface resistance of c-axis-oriented EuBa2Cu3O7-ythin films grown in situ onto (100)MgO by magnetron sputtering. The measurements were made at 50 GHz between 20 and 300 K in a TE013gold-plated invar cavity by replacing the endplate with a film. The surface resistance decreases sharply at 87 K to 40 m Ω at 77 K, becomes lower than that of an OFHC copper plate below 74 K, and lies within the measurement sensitivity range of 2 m Ω below 60 K. This low surface resistance suggests that MgO-based films are very suitable for high-frequency applications. © 1990 IOP Publishing Ltd.
引用
收藏
页码:L569 / L571
页数:3
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