OBOZNOV, V. A.; BOL'GINOV, V. V.; FEOFANOV, A. K.; RYAZANOV, V. V.; BUZDIN, Alexandre I.

doi:10.1103/PhysRevLett.96.197003

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OBOZNOV, V. A.
Osipyan Institute of Solid State Physics [ISSP]

BOL'GINOV, V. V.
Osipyan Institute of Solid State Physics [ISSP]

FEOFANOV, A. K.
Osipyan Institute of Solid State Physics [ISSP]

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Physical Review Letters. 2005, vol. 96, n° 19, p. 197003 (1-4)

American Physical Society

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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.< Réduire

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

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