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Title: 0 and pi phase Josephson coupling through an insulating barrier with magnetic impurities
Authors: Vavra, Ondrej ×
Gazi, S
Golubovic, DS
Vavra, I
Derer, J
Verbeeck, J
Van Tendeloo, G
Moshchalkov, Victor #
Issue Date: Jul-2006
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:74 issue:2 pages:1-4
Conference: date:Katholieke Univ Leuven, INPAC, Nanoscale Superconduct & Magnetism Grp, B-3001 Louvain, Belgium; Slovak Acad Sci, Inst Elect Engn, SK-84104 Bratislava, Slovakia; Univ Antwerp, EMAT, B-2020 Antwerp, Belgium
Article number: 20502
Abstract: We have studied the temperature and field dependencies of the critical current I-C in the Nb-Fe0.1Si0.9-Nb Josephson junction with a tunneling barrier formed by a paramagnetic insulator. We demonstrate that in these junctions coexistence of both the 0 and the pi states within one tunnel junction occurs, and leads to the appearance of a sharp cusp in the temperature dependence I-C(T), similar to the I-C(T) cusp found for the 0-pi transition in metallic pi junctions. This cusp is not related to the 0-pi temperature-induced transition itself, but is caused by the different temperature dependencies of the opposing 0 and pi supercurrents through the barrier.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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