Influence of edge barriers on vortex dynamics in thin weak-pinning superconducting strips

Britton Plourde, D. J. Van Harlingen, D. Yu Vodolazov, R. Besseling, M. B S Hesselberth, P. H. Kes

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

We introduce a type of vortex entry edge barrier which controls the critical current in a perpendicular magnetic field in thin-film weak-pinning superconducting strips. Measurements of the critical current in thin-film amorphous-MoGe strips show a linear decrease with increasing magnetic field strength at low magnetic fields, and a crossover at a well-defined threshold field to an inverse power-law decay that is independent of the strip width. This behavior has not been observed previously due to bulk pinning, which only becomes dominant in our MoGe samples at high magnetic fields. To describe our results, we present calculations of the current distribution in thin superconducting strips with a finite penetration depth and negligible bulk pinning, and show that the measured critical currents in our MoGe samples correspond to a current density at the strip edge which approaches the Ginzburg-Landau depairing limit. Shape variations and defects along the strip edges influence the vortex entry conditions, leading to deviations from the ideal behavior, including offsets in the critical current maximum with respect to zero field.

Original languageEnglish (US)
Article number014503
Pages (from-to)145031-145036
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number1
StatePublished - 2001

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Critical currents
strip
Vortex flow
vortices
Magnetic fields
critical current
magnetic fields
entry
Thin films
Current density
current distribution
thin films
Defects
field strength
crossovers
penetration
current density
deviation
thresholds
defects

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Plourde, B., Van Harlingen, D. J., Vodolazov, D. Y., Besseling, R., Hesselberth, M. B. S., & Kes, P. H. (2001). Influence of edge barriers on vortex dynamics in thin weak-pinning superconducting strips. Physical Review B - Condensed Matter and Materials Physics, 64(1), 145031-145036. [014503].

Influence of edge barriers on vortex dynamics in thin weak-pinning superconducting strips. / Plourde, Britton; Van Harlingen, D. J.; Vodolazov, D. Yu; Besseling, R.; Hesselberth, M. B S; Kes, P. H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 64, No. 1, 014503, 2001, p. 145031-145036.

Research output: Contribution to journalArticle

Plourde, B, Van Harlingen, DJ, Vodolazov, DY, Besseling, R, Hesselberth, MBS & Kes, PH 2001, 'Influence of edge barriers on vortex dynamics in thin weak-pinning superconducting strips', Physical Review B - Condensed Matter and Materials Physics, vol. 64, no. 1, 014503, pp. 145031-145036.
Plourde B, Van Harlingen DJ, Vodolazov DY, Besseling R, Hesselberth MBS, Kes PH. Influence of edge barriers on vortex dynamics in thin weak-pinning superconducting strips. Physical Review B - Condensed Matter and Materials Physics. 2001;64(1):145031-145036. 014503.
Plourde, Britton ; Van Harlingen, D. J. ; Vodolazov, D. Yu ; Besseling, R. ; Hesselberth, M. B S ; Kes, P. H. / Influence of edge barriers on vortex dynamics in thin weak-pinning superconducting strips. In: Physical Review B - Condensed Matter and Materials Physics. 2001 ; Vol. 64, No. 1. pp. 145031-145036.
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