0−π transition in superconductor-ferromagnet-superconductor junctions with strongly spin-dependent scattering
O. Kashuba, Ya. M. Blanter, Vladimir I. Fal’ko
DOI 10.1103/PhysRevB.75.132502 · Physical Review B
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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.
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