The critical current-field dependence of a Josephson superlattice

Author

Amin, H. ; Blamire, M.G. ; Evetts, J.E.

Author_Institution

Dept. of Mater. Sci., Cambridge Univ., UK

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

2204

Lastpage

2207

Abstract

The set of coupled nonlinear equations that describes the phase in the Josephson superlattice is presented. Numerical solutions for the simplest of the stacked junction systems, the two-junction system, are investigated in the stationary state for a number of cases of differing critical current densities and junction spacings as a function of parallel applied magnetic field. The results show that the behavior of the system is determined to a great extent by the higher J/sub c/ junction. The numerical solutions are compared with experimental results obtained from SISIS (superconductor-insulator-superconductor-insulator-superconductor) devices (where the superconductor is Nb and the insulator is Al/sub 2/O/sub 3/) and their significance for the Fraunhofer response of high-T/sub c/ bijunction structures is discussed.<>

Keywords

Josephson effect; critical current density (superconductivity); superconducting junction devices; superconducting superlattices; Fraunhofer response; Josephson superlattice; Nb-Al/sub 2/O/sub 3/ based systems; coupled nonlinear equations; critical current-field dependence; high-T/sub c/ bijunction structures; stacked junction systems; stationary state; two-junction system; Couplings; Critical current density; Insulation; Josephson junctions; Magnetic fields; Magnetic superlattices; Niobium; Nonlinear equations; Stationary state; Superconducting devices;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233941

Filename

233941