Flux motion by quantum tunnelling in high- Tc superconductors

D. Fiorani*, A. Garcia, Xixiang Zhang, A. M. Testa, J. Tejada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The results of low-temperature magnetic-relaxation experiments in TlBaCaCuO superconductors (2212 and 2223 phase) are reported. They give evidence of a crossover from a thermally activated regime of flux motion to a nonthermally activated one. The magnetic-relaxation rate is found to become temperature independent below ≅7K and ≅3K, for the 2212 and 2223 phase, respectively. Its value compares well with that predicted by the theories of flux motion by quantum tunnelling.

Original languageEnglish (US)
Pages (from-to)1925-1932
Number of pages8
JournalIl Nuovo Cimento D
Volume16
Issue number10
DOIs
StatePublished - Jan 1 1994

Keywords

  • 01.30.Cc
  • 74.60.Ge
  • 74.60.Jg
  • Conference proceedings
  • Critical currents
  • Flux pinning
  • flux motion
  • fluxon-defect interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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