Measurement of the Current-Phase Relation of SFS pi-Josephson junctions

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dc.creatorFrolov, S. M.
dc.creatorVan Harlingen, D. J.
dc.creatorOboznov, V. A.
dc.creatorBolginov, V. V.
dc.creatorRyazanov, V. V.
dc.date2004-02-17
dc.date.accessioned2026-07-07T02:56:31Z
dc.date.available2026-07-07T02:56:31Z
dc.descriptionWe present measurements of the current-phase relation (CPR) of Superconductor-Ferromagnet-Superconductor (SFS) Josephson junctions as a function of temperature. The CPR is determined by incorporating the junction into a superconducting loop coupled to a dc SQUID, allowing measurement of the junction phase difference. Junctions fabricated with a thin (~ 22 nm) barrier of Cu0.47Ni0.53 sandwiched between Nb electrodes exhibit a re-entrant critical current with temperature, vanishing at T =T_pi ~ 2-4 K. We find that the critical current is negative for T < T_pi, indicating that the junction is a pi-Josephson junction. We find no evidence for second-order Josephson tunneling near T_pi in the CPR predicted by several theories.
dc.description5 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0402434
dc.identifierhttp://arxiv.org/abs/cond-mat/0402434
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23352
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleMeasurement of the Current-Phase Relation of SFS pi-Josephson junctions
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