Effect of vortex-core size on the flux lattice in a mesoscopic superconducting strip

I. Kokanović, A. Helzel, D. Babić, C. Sürgers, and C. Strunk
Phys. Rev. B 77, 172504 – Published 22 May 2008

Abstract

We present an experimental study of the vortex-motion dissipation in a mesoscopic amorphous (a)Nb0.7Ge0.3 strip, with emphasis on the results for 3–8 vortex rows parallel to the long strip axis. In the isothermal voltage vs magnetic field traces, at a constant current, we observe plateaus superimposed onto a monotonic background. The plateaus appear because finite vortex-core size influences the accommodation of the flux lattice into the strip. This conclusion is drawn from a quantitative analysis, which is free of adjustable parameters, of the magnetic fields that edge the plateaus.

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  • Received 25 March 2008

DOI:https://doi.org/10.1103/PhysRevB.77.172504

©2008 American Physical Society

Authors & Affiliations

I. Kokanović1, A. Helzel2, D. Babić1,*, C. Sürgers3, and C. Strunk2

  • 1Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, HR-10000 Zagreb, Croatia
  • 2Institute for Experimental and Applied Physics, University of Regensburg, D-93025 Regensburg, Germany
  • 3Physikalisches Institut and DFG Center for Functional Nanostructures (CFN), Universität Karlsruhe, D-76128 Karlsruhe, Germany

  • *Corresponding author; dbabic@phy.hr

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Issue

Vol. 77, Iss. 17 — 1 May 2008

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