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Article Dans Une Revue Physical Review Letters Année : 2005

Thickness dependence of the Josephson ground states of superconductor-ferromagnet-superconductor junctions

Résumé

We report the first experimental observation of the two-node thickness dependence of the critical current in Josephson junctions with a ferromagnetic interlayer. Vanishings of the critical current correspond to transitions into pi-state and back into conventional 0-state. The experimental data allow to extract the superconducting order parameter oscillation period and the pair decay length in the ferromagnet. We develope a theoretical approach based on Usadel equations, which takes into account the spin-flip scattering. Results of numerical calculations are in good agreement with the experimental data.

Dates et versions

hal-00401466 , version 1 (03-07-2009)

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V. A. Oboznov, V. V. Bol'Ginov, A. K. Feofanov, V. V. Ryazanov, Alexandre I. Buzdin. Thickness dependence of the Josephson ground states of superconductor-ferromagnet-superconductor junctions. Physical Review Letters, 2005, 96 (19), pp.197003 (1-4). ⟨10.1103/PhysRevLett.96.197003⟩. ⟨hal-00401466⟩

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