Pinning of a fluxon chain in a long Josephson junction with a lattice of inhomogeneities: Theory and experiment

Journal Article · Sun Apr 15 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.345025· OSTI ID:6944315

Malomed, B A ^[1]; Ustinov, A V ^[2]

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1. P. P. Shirshov Institute of Oceanology, USSR Academy of Sciences, 23 Krasikov Street, Moscow, 117218, USSR (SU)
2. Institute of Solid State Physics, USSR Academy of Sciences, Chernogolovka, Moscow district, 142432, USSR (SU)

A pinning force acting upon a periodic fluxon chain in a long Josephson junction with a commensurable periodic lattice of local inhomogeneities is calculated by means of a perturbation theory. The pinning force for a single fluxon is also calculated. Dynamics of a chain and of a single fluxon are also studied. The experimental part of the paper reports results of measurements of a critical bias current {ital I}{sub {ital c}} versus external magnetic field {ital H}. The measurements have been performed for long overlap Nb-NbO{sub {ital x}}-Pb junctions {ital I}{sub {ital c}}({ital H}) curve were observed at multiple values of {ital H}. Agreement between the theory and experiment for different spatial periods of the fluxon chain is satisfactory.

• OSTI ID: 6944315
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHAINS
CHALCOGENIDES
CRITICAL CURRENT
CURRENTS
DYNAMICS
ELECTRIC CURRENTS
ELEMENTS
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD
MAGNETIC FIELDS
MAGNETIC FLUX
MECHANICS
METALS
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PERTURBATION THEORY
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS