Zero-field singularities in Josephson tunnel junctions of intermediate length
Zero-field singularities (Z.F.S.) appear in the d.c. current-voltage characteristic of Josephson tunnel junction longer than the Josephson penetration depth lambdaj. This modes are currently explained in terms of periodical oscillations of fluxons in the junction, and show potential applications in microwave devices. A set of one dimensional overlap junctions of length between 5.6lambdaj and 1.6lambdaj have been studied. Detailed experimental investigations of the current-voltage d.c. characteristics of Z.F.S. are reported. The authors find that the I-V shape becomes steeper very regularly either by increasing the Z.F.S. order number or by decreasing the junction length. A similar behavior is measured for 2..pi.. -kink oscillations on a mechanical analog. Moreover in real junctions anomalous structures appear in high order singularities.
- Research Organization:
- Dipartimento di Fisica, Universita di Salerno, Salerno
- OSTI ID:
- 6340498
- Report Number(s):
- CONF-840937-
- Journal Information:
- IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. MAG-21:2; ISSN IEMGA
- Country of Publication:
- United States
- Language:
- English
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