Dendritic flux instability in MgB2 films above liquid hydrogen temperature

E. Baruch-El, M. Baziljevich, T. H. Johansen, J. Albrecht, A. Shaulov, Y. Yeshurun

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Magnetic flux instability limits potential applications of superconductors such as MgB2 in practical devices. Previous studies in MgB2 films exposed to magnetic fields revealed the occurrence of dendritic flux avalanches at temperatures below T ∼ 10 K. In the present work it is shown that films of MgB2 exposed to a fast-ramped magnetic field display a dendritic flux instability at elevated temperatures, up to 23 K. Such instability can therefore cause malfunctioning of practical devices based on MgB2 films even when operating at liquid hydrogen temperature.

Original languageEnglish
Article number025005
JournalSuperconductor Science and Technology
Volume31
Issue number2
DOIs
StatePublished - Feb 2018

Bibliographical note

Publisher Copyright:
© 2017 IOP Publishing Ltd.

Keywords

  • MgB
  • dendritic flux instability
  • liquid hydrogen
  • magneto-optical imaging
  • superconductivity

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