Suppression of the critical current of a balanced superconducting quantum interference device

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2008
Major/Subject
Mcode
Degree programme
Language
en
Pages
052110/1-3
Series
Applied Physics Letters, Volume 92, Issue 5
Abstract
We present an experimental study of the magnetic flux dependence of the critical current of a balanced superconducting quantum interference device (SQUID) with three Josephson junctions in parallel. Unlike for ordinary direct current (dc) SQUIDs, the suppression of the critical current does not depend on the exact parameters of the Josephson junctions. The suppression is essentially limited only by the inductances of the SQUID loops. We demonstrate a critical current suppression ratio of higher than 300 in a balanced SQUID with a maximum critical current 30nA .
Description
Keywords
SQUID, critical currents, superconducting quantum interference devices, electric measurements, nonlinear acoustics, Josephson junctions
Other note
Citation
Kemppinen, Antti & Manninen, Antti J. & Möttönen, Mikko & Vartiainen, Juha J. & Peltonen, Joonas T. & Pekola, Jukka. 2008. Suppression of the critical current of a balanced superconducting quantum interference device. Applied Physics Letters. Volume 92, Issue 5. P. 052110/1-3. ISSN 0003-6951 (printed). DOI: 10.1063/1.2842413.