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Article Dans Une Revue Superconductor Science and Technology Année : 2011

Josephson current and $\pi-$state in ferromagnet with embedded superconducting nanoparticles

Résumé

On the basis of Usadel equations we investigate superconductor/ferromagnet/superconductor (S/F/S) hybrid systems which consist of superconducting nanostructures (spheres, rods) embedded in ferromagnetic metal. The oscillations of the critical current of the S/F/S Josephson junctions with the thickness of ferromagnetic spacer between superconducting electrodes are studied. We demonstrate that the $\pi $ state can be realized in such structures despite of a dispersion of the distances between different parts of the electrodes. The transitions between 0 and $\pi $ states at some thickness of ferromagnetic spacer can be triggered by temperature variation.

Dates et versions

hal-00563395 , version 1 (04-02-2011)

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A. V. Samokhvalov, Alexandre I. Buzdin. Josephson current and $\pi-$state in ferromagnet with embedded superconducting nanoparticles. Superconductor Science and Technology, 2011, 24 (2), 024003 (7 p.). ⟨10.1088/0953-2048/24/2/024003⟩. ⟨hal-00563395⟩

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