0-pi Josephson tunnel junctions with ferromagnetic barrier

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Weides, M.; Kemmler, M.; Kohlstedt, H.; Waser, R.; Koelle, D.; Kleiner, R.; Goldobin, E.;

We fabricated high quality Nb/Al2O3/Ni0.6Cu0.4/Nb superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions. Using a ferromagnetic layer with a steplike thickness, we obtain a 0-pi junction, with equal lengths and critical currents of 0 and pi parts... View more
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