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

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2707

Lastpage

2710

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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403149

Filename

403149