On the behaviour of a two dimensional Josephson tunnel junction in the weakly non-linear regime
Abstract
The chaotic bifurcation of low current density, two-dimensional Josephson junctions has been investigated experimentally. The experimental setup permitted measurement of the frequency spectrum up to and above the maximum plasma frequency of 770 MHz, by means of a low-noise amplifier operating in the 5-1000 MHz range. The fundamental cavity resonance frequency of the junctions was 4.3 GHz in the linear limit. It is shown that the two-dimensional structure of the junctions gave rise to a Fiske-modelike excitation in one direction and zero-field mode excitation in the other. Selfpumped excitation of a mixed Fiske-mode was observed in a magnetic field. Although the experimental setup was sufficiently broadbanded and sensitive to detect subharmonic chaotic bifurcations, no chaotic behavior was observed in the strongly nonlinear regime. Some possible reasons for the absence of chaotic behavior are discussed.
- Publication:
-
IEEE Transactions on Magnetics
- Pub Date:
- March 1985
- DOI:
- 10.1109/TMAG.1985.1063876
- Bibcode:
- 1985ITM....21..632M
- Keywords:
-
- Chaos;
- Current Distribution;
- Josephson Junctions;
- Plasma Resonance;
- Tunnel Diodes;
- Volt-Ampere Characteristics;
- Boundary Value Problems;
- Cavity Resonators;
- Current Density;
- Partial Differential Equations;
- Solitary Waves;
- Electronics and Electrical Engineering