Abstract
We have studied the critical current–magnetic field dependence,Ic(B), of nanoSQUIDs. The vortex penetration field of a Nb/Au bilayer filmwas determined from the hysteretic behaviour of the nanoSQUID’sIc(B) pattern. The current–voltage characteristics of Nb/Au bilayer microbridges were alsostudied. The vortex penetration field was found to be much lower than the Nb single-layercounterpart. These properties suggest that a nanoSQUID may be a potentialtrapped-vortex memory device, which is discussed.
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