Thickness Dependence of the Josephson Ground States of Superconductor-Ferromagnet-Superconductor Junctions
V. A. Oboznov, V. V. Bol’ginov, A. K. Feofanov, V. V. Ryazanov, A. I. Buzdin
DOI 10.1103/PhysRevLett.96.197003 · Physical Review Letters
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Abstract
We report the first experimental observation of the two-node thickness dependence of the critical current in Josephson junctions with a ferromagnetic interlayer. Nodes of the critical current correspond to the transitions into the π state and back into the conventional 0 state. From the experimental data the superconducting order parameter oscillation period and the pair decay length in the ferromagnet are extracted reliably. We develop a theoretical approach based on the Usadel equations taking into account the spin-flip scattering. Results of numerical calculations are in good agreement with experiments.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | onset |
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