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0-pi transition in superconductor-ferromagnet-superconductor junctions with strongly spin.

Research output: Contribution to journalJournal article

Published

Journal publication date19/04/2007
JournalPhysical Review B
Volume75
Pages132502
Original languageEnglish

Abstract

We develop a theory of the critical current in superconductor–ferromagnetic alloy–superconductor trilayers, which takes into account the strong spin dependence of electron scattering on compositional disorder in a diluted ferromagnetic alloy. We show that in such a system the critical current oscillations as a function of the thickness of the ferromagnetic layer, with period of vF/2I, vF and I being the Fermi velocity and exchange splitting, respectively, decay exponentially with a characteristic length of the order of the mean free path.