0-pi Josephson tunnel junctions with ferromagnetic barrier

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dc.creatorWeides, M.
dc.creatorKemmler, M.
dc.creatorGoldobin, E.
dc.creatorKohlstedt, H.
dc.creatorWaser, R.
dc.creatorKoelle, D.
dc.creatorKleiner, R.
dc.date2006-05-26
dc.date2006-10-05
dc.date.accessioned2026-07-07T07:09:13Z
dc.date.available2026-07-07T07:09:13Z
dc.descriptionWe 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-like thickness, we obtain a 0-pi junction, with equal lengths and critical currents of 0 and pi parts. The ground state of our 330 microns (1.3 lambda_J) long junction corresponds to a spontaneous vortex of supercurrent pinned at the 0-pi step and carrying ~6.7% of the magnetic flux quantum Phi_0. The dependence of the critical current on the applied magnetic field shows a clear minimum in the vicinity of zero field.
dc.descriptionsubmitted to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0605656
dc.identifierhttp://arxiv.org/abs/cond-mat/0605656
dc.identifierPhys. Rev. Lett. 97, 247001 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.247001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110981
dc.subjectSuperconductivity
dc.title0-pi Josephson tunnel junctions with ferromagnetic barrier
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