Micron scale stacked structures fabricated from BSCCO 2212 single crystal whiskers

Measurements of the critical current Ic along the c-axis as a function of the parallel magnetic field H clearly demonstrate the intrinsic DC Josephson effect on small area stacked junctions fabricated from perfect single crystal Bi2Sr2CaCu2O8 whiskers with in plane size L less than 20 μm. For large values of L a dimensional crossover to monotonous size independent behaviour of Ic(H) is observed. Overlap stacked analogues of long Josephson junctions have also been developed. Flux-flow steps on current voltage characteristics (IVC) of those junctions have been found in high parallel magnetic fields due to a collective motion of the Josephson vortex lattice. (orig.)