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

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<mark>Journal publication date</mark>19/04/2007
<mark>Journal</mark>Physical Review B
Volume75
Pages (from-to)132502
<mark>State</mark>Published
<mark>Original language</mark>English

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.