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

Boris A. Malomed; Alexey V. Ustinov

doi:10.1063/1.345025

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

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Abstract

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 I_c versus external magnetic field H. The measurements have been performed for long overlap Nb-NbO_x-Pb junctions I_c(H) curve were observed at multiple values of H. Agreement between the theory and experiment for different spatial periods of the fluxon chain is satisfactory.

Original language	English
Pages (from-to)	3791-3797
Number of pages	7
Journal	Journal of Applied Physics
Volume	67
Issue number	8
DOIs	https://doi.org/10.1063/1.345025
State	Published - 1990
Externally published	Yes

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abstract = "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 Ic versus external magnetic field H. The measurements have been performed for long overlap Nb-NbOx-Pb junctions Ic(H) curve were observed at multiple values of H. Agreement between the theory and experiment for different spatial periods of the fluxon chain is satisfactory.",

author = "Malomed, {Boris A.} and Ustinov, {Alexey V.}",

year = "1990",

doi = "10.1063/1.345025",

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AU - Ustinov, Alexey V.

PY - 1990

Y1 - 1990

N2 - 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 Ic versus external magnetic field H. The measurements have been performed for long overlap Nb-NbOx-Pb junctions Ic(H) curve were observed at multiple values of H. Agreement between the theory and experiment for different spatial periods of the fluxon chain is satisfactory.

AB - 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 Ic versus external magnetic field H. The measurements have been performed for long overlap Nb-NbOx-Pb junctions Ic(H) curve were observed at multiple values of H. Agreement between the theory and experiment for different spatial periods of the fluxon chain is satisfactory.

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

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