NDLI: Limiting response times in a granular niobium weak link

Content Provider	IEEE Xplore Digital Library
Author	Peters, R. Refai, T. Wolf, S. Rachford, F.
Copyright Year	1965
Abstract	We have measured rf SQUID characteristics of a granular niobium weak link as a function of frequency from 20 MHz to 9 GHz. A degredation in the SQUID performance and a critical current enhancement is correlated with the a non-equilibrium site decay time as inferred from the frequency dependence of the critical current hysteresis. At low frequencies, the electromagnetic response time extracted from the frequency dependent SQUID modulation is found to be of the same order of magnitude as the quasiparticle inelastic scattering time. The electromagnetic response time is found to decrease at temperatures and frequencies where the critical currents are enhanced. The large (an order of magnitude) critical current enhancement seems to be associated with the granular nature of the weak link.
Sponsorship	IEEE Magnetics Society
Starting Page	280
Ending Page	283
Page Count	4
File Size	411509
File Format	PDF
ISSN	00189464
Volume Number	15
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1979-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delay Niobium Critical current SQUIDs Frequency dependence Electromagnetic scattering Frequency measurement Hysteresis Frequency modulation Temperature
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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