Title :
Self-field effects in two-dimensional Nb Josephson-junction arrays
Author :
Trias, E. ; Phillips, J.R. ; van der Zant, H.S.J. ; Orlando, T.P.
Author_Institution :
MIT, Cambridge, MA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have measured two-dimensional niobium Josephson junction arrays in which self induced fields are important. We find an increase of the depinning current when /spl lambda//sub /spl perp//, the penetration depth in the array, is of the order of one. There is evidence for a destruction of commensurate vortex states in the arrays as the depinning current becomes almost independent of the applied magnetic field. Our data also show that self-field effects change the array flux-flow dynamics and decrease the effective array viscosity.<>
Keywords :
Josephson effect; flux flow; flux pinning; niobium; penetration depth (superconductivity); superconducting junction devices; Nb; commensurate vortex states; depinning current; flux-flow dynamics; magnetic field; penetration depth; self-field effects; two-dimensional niobium Josephson junction arrays; viscosity; Critical current; Electrical resistance measurement; Josephson junctions; Laboratories; Magnetic field measurement; Magnetic fields; Niobium; Phased arrays; Superconducting devices; Viscosity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
