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Spectroscopy of the fractional vortex eigenfrequency in a long Josephson 0-kappa junction
K. Buckenmaier, T. Gaber, M. Siegel +3
Fractional Josephson vortices carry a magnetic flux Phi, which is a fraction of the magnetic flux quantum Phi_0 ~ 2.07x10^{-15} Wb. Their properties are very different from the pro…
0-pi Josephson tunnel junctions with ferromagnetic barrier
M. Weides, M. Kemmler, E. Goldobin +4
We fabricated high quality Nb/Al_2O_3/Ni_{0.6}Cu_{0.4}/Nb superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions. Using a ferromagnetic layer with a step-li…
Commensurability effects in superconducting Nb films with quasiperiodic pinning arrays
M. Kemmler, C. Guerlich, A. Sterck +5
We study experimentally the critical depinning current Ic versus applied magnetic field B in Nb thin films which contain 2D arrays of circular antidots placed on the nodes of quasi…
High quality ferromagnetic 0 and pi Josephson tunnel junctions
M. Weides, M. Kemmler, H. Kohlstedt +4
We fabricated high quality $\Nb/\Al_2Ø_3/\Ni_{0.6}\Cu_{0.4}/\Nb$ superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions. Depending on the thickness of the f…