Giant flux jumps through a thin superconducting nb film in a vortex free region

M. I. Tsindlekht*, V. M. Genkin, I. Felner, F. Zeides, N. Katz, Gazi, Chromik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We measure the dynamics of magnetic field penetration into thin-walled superconducting niobium cylinders. It is shown that magnetic field penetrates through the wall of a cylinder in a series of giant jumps with amplitude 1 - 2 mT and duration of less than a microsecond in a wide range of magnetic fields, including the vortex free region. Surprisingly, the jumps take place when the total current in the wall, not the current density, exceeds a critical value. In addition, there are small jumps and/or smooth penetration, but their contribution reaches only ≃ 20 % of the total penetrating flux. The number of jumps decreases with increased temperature. Thermomagnetic instabilities cannot explain the experimental observations.

Original languageAmerican English
Pages (from-to)1-7
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume529
DOIs
StatePublished - 15 Oct 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

  • Flux jumps
  • Superconductivity
  • Thin-walled cylinders

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