MAGNETORESISTANCE OF CU-NI MULTILAYERS

Attempts to measure the magnetoresistance of a metal multilayer with the current in the growth direction can usefully employ a strategy which maximises the resistance to be measured. We describe preliminary attempts to achieve this by making arrays of multilayer mesas joined by Nb interconnects. At 4.2 K the Nb is superconducting, leaving only the resistance of the multilayer. For a given multilayer resistivity, our approach increases the measured resistance by raising the sample length whilst reducing its cross-sectional area.