Josephson current in a superconductor -- ferromagnet -- superconductor junction with in-plane ferromagnetic domains

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dc.creatorCrouzy, B.
dc.creatorTollis, S.
dc.creatorIvanov, D. A.
dc.date2007-06-12
dc.date.accessioned2026-07-07T08:33:02Z
dc.date.available2026-07-07T08:33:02Z
dc.descriptionWe study a diffusive superconductor--ferromagnet--superconductor (SFS) junction with in-plane ferromagnetic domains. Close to the superconducting transition temperature, we describe the proximity effect in the junction with the linearized Usadel equations. We find that properties of such a junction depend on the size of the domains relative to the magnetic coherence length. In the case of large domains, the junction exhibits transitions to the $π$ state, similarly to a single-domain SFS junction. In the case of small domains, the magnetization effectively averages out, and the junction is always in the zero state, similarly to a superconductor--normal metal--superconductor (SNS) junction. In both those regimes, the influence of domain walls may be approximately described as an effective spin-flip scattering. We also study the inhomogeneous distribution of the local current density in the junction. Close to the 0--$π$ transitions, the directions of the critical current may be opposite in the vicinity of the domain wall and in the middle of the domains.
dc.description9 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0706.1638
dc.identifierhttp://arxiv.org/abs/0706.1638
dc.identifierPhys. Rev. B 76, 134502 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.134502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/138989
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleJosephson current in a superconductor -- ferromagnet -- superconductor junction with in-plane ferromagnetic domains
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