The current{endash}voltage characteristics of the resistive direct current superconducting quantum interference device

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.364057· OSTI ID:450265

Greenberg, Y S; Krivoy, G S; Koch, H ^[1]

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1. Physikalisch-Technische Bundesanstalt, Abbestrasse 10-12, D-10587 Berlin (Germany)

Partly resistive superconducting quantum interference devices (RSQUIDs) are used in noise thermometry in the liquid helium temperature range. Here we analyze one type of RSQUID that has not been thoroughly investigated until now: the direct current biased with two Josephson junctions and a resistive part connected in series with the junctions and closed by a superconducting ring. The resistive shunted model of the Josephson junctions is used for the analysis. Two cases of the RSQUID ring inductance were analyzed: (i) negligibly small and (ii) small but finite inductance. The expressions for the low frequency output signal, the current{endash}voltage {ital (I{endash}V)} characteristics, and the current flowing through the resistive part are obtained. In the dependence of the output frequency versus the dc current passed through the resistive part often an offset is observed experimentally. This phenomenon can be explained as an influence of an asymmetry in the critical currents of the junctions. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 450265
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
66 PHYSICS
CRITICAL CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
FREQUENCY DEPENDENCE
INDUCTANCE
JOSEPHSON JUNCTIONS
RINGS
SQUID DEVICES
TEMPERATURE MEASUREMENT