Fluxon pinning in annular Josephson junctions by an external magnetic field
- Physikalisches Institut, Lehrstuhl Experimentalphysik II, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)
- Institut fuer Schicht- und Ionentechnik, Forschungszentrum Juelich (KFA), D-52425 Juelich (Germany)
The behavior of long annular Josephson junctions with various numbers n of trapped fluxons is studied in the presence of a uniform external magnetic field parallel to the plane of the junction{close_quote}s tunnel barrier. We report on measurements of the magnetic dependencies of the critical current and current{endash}voltage characteristics with different n. Experimental results are explained by the model assuming that a barrier-parallel magnetic field produces potential wells for fluxons and antifluxons at the opposite locations. We also present numerical simulations using the perturbed sine-Gordon equation with an additional magnetic-field-induced term. Good agreement is found between the measured critical current versus magnetic-field dependencies and the numerical simulations. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 450232
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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