We have realized multifacet Josephson junctions with periodically alternating critical current density (MJJs) using superconductor-insulator-ferromagnet-superconductor heterostructures. We show that anomalous features of critical current vs. applied magnetic field, observed also for other types of MJJs, are caused by a non-uniform flux density (parallel to the barrier) resulting from screening currents in the electrodes in the presence of a (parasitic) off-plane field component.
@article{arxiv.1003.3216,
title = {Interference patterns of multifacet 20x(0-pi-) Josephson junctions with ferromagnetic barrier},
author = {S. Scharinger and C. Gürlich and R. G. Mints and M. Weides and H. Kohlstedt and E. Goldobin and D. Koelle and R. Kleiner},
journal= {arXiv preprint arXiv:1003.3216},
year = {2011}
}