GdBa2Cu3OX FOR MICROWAVE APPLICATIONS: PREPARATION, PROPERTIES AND DEVICES

被引：8

作者：

Jedamzik, D. ^{[1
]}

Trowles, T. P. ^{[1
]}

Zammattio, S. J. ^{[1
]}

Stephan, R. E. ^{[1
]}

Lamacraft, K. ^{[1
]}

Phillips, W. A. ^{[1
]}

Hedges, S. J. ^{[2
]}

Adams, M. ^{[2
]}

Nicholson, B. F. ^{[2
]}

机构：

[1] GEC Marconi Ltd, Hirst Res Ctr, E Lane, Wembley HA9 7PP, Middx, England

[2] GEC Marconi Ltd, Marconi Res Ctr, Chelmsford CM2 8HN, Essex, England

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期

关键词：

D O I：

10.1109/77.233600

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：

GdBa2Cu3O7 has very similar properties to YBa2Cu3O7 but appears to be more tolerant of processing conditions. Thin films prepared by inverted cylindrical magnetron sputtering on MgO single crystals routinely give transition temperatures above 92K and critical currents above 106 Acm(-2) at 77K. Films with areas exceeding 12cm(2) have been deposited on 0.5mm thick substrates. Structural and compositional studies show a high degree of film perfection. Measurements of surface resistance, using a cavity end wall replacement technique at 60GHz, give values < 20m Omega at 77K (uncorrected for film thickness, typically 0.4-0.5 mu m) and suspended substrate stripline resonators give Q values over an order of magnitude larger than the corresponding gold resonator. A 2% 4GHz filter has been realised in microstrip with a minimum insertion loss below 0.6dB.

引用

页码：1733 / 1736

页数：4

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