Published online by Cambridge University Press: 15 May 1999
This paper reports on the first realization using high temperature superconductingfilms of the device proposed in 1965 by Giaever: the DC-DC transformer, which involvesflux-flow vortex motion in two superimposed thin films, separated by a thin insulatinglayer. The device was fabricated using the ramp based multilayer technology from anYBa2Cu3O7 based SIS structure grown by pulsed laser deposition. Transportmeasurements exhibiting the coupling and decoupling phenomena between the two vortexarrays are obtained. We discuss the possibility of widening the working range of thisdevice, which constitutes an important result in the effort to use high temperaturesuperconductors for electronics.