Abstract
Both experimental and numerical studies of a self-frustrated triangular array ofπ-junctions are reported. The array of SFS Josephson junctions shows a transition to theπ-state and self-frustration with a decrease in temperature. This manifests itself in a half-periodshift of the bias critical current versus applied magnetic field. At temperatures close to the0–π transition this dependence shows a doubling of its periodicity frequency that can be explained by0–π bistability of the SFS junctions. The change in the array behaviour with number of unitcells has been studied by means of numerical simulation.
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