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Browse Journals & Magazines > Applied Superconductivity, IE ...> Volume:9 Issue:2 Help

Investigation for the basic characteristics of HTS SFQ logic gate

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3 Author(s)
Saitoh, K. ; Supercond. Res. Lab., Int. Supercond. Technol. Center, Tokyo, Japan ; Utagawa, T. ; Enomoto, Y.

The characteristics of a simple logic gate which consists of an rf-Superconducting QUantum Interference Device (SQUID) and dc-SQUID has been investigated in connection with the Single-Flux-Quantum (SFQ) logic operation and Josephson junction characteristics. The Josephson junctions were made of Neodymium Barium Copper Oxide thin film employing Focused Ion Beam technology. We confirmed the generating SFQ in the rf-SQUID and simultaneous read-out by the dc-SQUID up to 50 K. It has been found that the temperature dependence of output voltage level decreased more rapid than that of critical current normal resistance product. The origin of the discrepancy was studied using a phenomenological model of the Josephson junction and numerical simulation.

Published in:
Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )

Date of Publication: June 1999

Page(s):
3837 - 3840
ISSN :
1051-8223
INSPEC Accession Number:
6368493
Digital Object Identifier :
10.1109/77.783864
Date of Current Version :
06 August 2002
Issue Date :
June 1999
Sponsored by :
The IEEE Council on Superconductivity

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