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All highTcedge‐geometry weak links utilizing Y‐Ba‐Cu‐O barrier layers

 

作者: B. D. Hunt,   M. C. Foote,   L. J. Bajuk,  

 

期刊: Applied Physics Letters  (AIP Available online 1991)
卷期: Volume 59, issue 8  

页码: 982-984

 

ISSN:0003-6951

 

年代: 1991

 

DOI:10.1063/1.106321

 

出版商: AIP

 

数据来源: AIP

 

摘要:

High quality YBa2Cu3O7−x/normal‐metal/YBa2Cu3O7−xedge‐geometry weak links have been fabricated using nonsuperconducting Y‐Ba‐Cu‐O barrier layers deposited by laser ablation at reduced growth temperatures. Devices incorporating 25–100 A˚ thick barrier layers exhibit current‐voltage characteristics consistent with the resistively shunted junction model, with strong microwave and magnetic field response at temperatures up to 85 K. The critical currents vary exponentially with barrier thickness, and the resistances scale linearly with Y‐Ba‐Cu‐O interlayer thickness and device area, indicating good barrier uniformity, with an effective normal metal coherence length of 20 A˚.

 

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