Thickness dependence of the Josephson ground states of superconductor-ferromagnet-superconductor junctions
BUZDIN, Alexandre I.
Centre de physique moléculaire optique et hertzienne [CPMOH]
Institut universitaire de France [IUF]
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Centre de physique moléculaire optique et hertzienne [CPMOH]
Institut universitaire de France [IUF]
Language
en
Article de revue
This item was published in
Physical Review Letters. 2005, vol. 96, n° 19, p. 197003 (1-4)
American Physical Society
English Abstract
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 ...Read more >
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.Read less <
Origin
Hal imported