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4 papers
Double-reversal thickness dependence of critical current in superconductor-ferromagnet-superconductor Josephson junctions
V. A. Oboznov, V. V. Bol'ginov, A. K. Feofanov +2
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…
Spontaneous currents and half-integer Shapiro steps in Superconductor-Ferromagnet-Superconductor 0-pi Josephson junctions
S. M. Frolov, D. J. Van Harlingen, V. V. Bolginov +2
We study Superconductor-Ferromagnet-Superconductor (Nb-Cu0.47 Ni0.53-Nb) Josephson junctions with spatial variations in the barrier thickness. Critical current vs. magnetic flux di…
Measurement of the Current-Phase Relation of SFS pi-Josephson junctions
S. M. Frolov, D. J. Van Harlingen, V. A. Oboznov +2
We present measurements of the current-phase relation (CPR) of Superconductor-Ferromagnet-Superconductor (SFS) Josephson junctions as a function of temperature. The CPR is determin…
Intrinsically frustrated superconducting array of SFS π-junctions
V. V. Ryazanov, V. A. Oboznov, A. V. Veretennikov +1
We report a direct observation of the crossover of the superconductor- ferromagnet-superconductor (SFS) junctions to the π-state which manifests itself in the half-period shift of…