Microwave emission from two-stacked arrays of long Josephson junctions

Author

Carapella, G. ; Costabile, G. ; Latempa, R. ; Rasmussen, N.H. ; Mygind, J.

Author_Institution

Dipartimento di Fisica, Salerno Univ., Italy

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

1203

Lastpage

1206

Abstract

We have recorded the radiation generated by magnetic flux quanta oscillations and by cavity mode oscillations in two-stacked arrays each consisting of five long Josephson junctions biased in parallel. The two arrays have in common the middle electrode, which is thinner than the London penetration depth, and can be biased independently. Basically, two kind of fluxon states can be generated, one consisting of a row of five fluxons oscillating in one of the arrays, the other consisting of a row of five fluxons in one array and five antifluxons in the other array, bound in a coherent state. It is found from the microwave emission that the latter configuration is less sensitive to low-frequency noise

Keywords

Josephson effect; magnetic flux; penetration depth (superconductivity); superconducting arrays; London penetration depth; antifluxon state; cavity mode oscillation; coherent state; fluxon oscillator; fluxon state; long Josephson junction; low-frequency noise; magnetic flux quanta oscillation; microwave emission; stacked parallel array; Couplings; Electrodes; Josephson junctions; Low-frequency noise; Magnetic flux; Microwave antenna arrays; Microwave oscillators; Niobium; Physics; Robust stability;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919565

Filename

919565