Ca. Hollin et al., SPATIALLY-RESOLVED ELECTRICAL CHARACTERIZATION OF YBA2CU3O7 PRBA2CU3O7 MULTILAYER STRUCTURES/, Physica. C, Superconductivity, 235, 1994, pp. 721-722
Spatially resolved electrical variations in YBa2Cu3O7 / PrBa2Cu3O7 mul
tilayer structures have been imaged using low temperature scanning ele
ctron microscopy. In both via hole and crossover arrays the outer conn
ecting track crossing an MgO / PrBa2Cu3O7 step is often found to limit
the critical current of the whole structure. Widening the track over
such a step produced limiting behaviour in the crossover region itself
rather than at the step.