Non-monotonic high frequency flux-flow noise spectra in high-TC superconductors

V. D. Ashkenazy, M. Bonaldi, G. Jung, B. Ya Shapiro, S. Vitale

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Nonmonotonic voltage noise spectra have been observed in granular high-Tc YBaCuO thin films. The maximum at low frequencies and oscillations at high frequencies are explained in the framework of the interrupted vortex flow model. Separation between the oscillations corresponds to the time of flight of vortices across the strip. The maximum at low frequencies results from viscous relaxation of pinned vortices. The data indicate that high frequency voltage noise is due to Josephson vortices flowing with a very low viscosity between grains. The pinning frequency determined from the position of low frequency peak is consistent with surface pinning of Abrikosov vortices inside the grains.

Original languageEnglish
Pages (from-to)517-521
Number of pages5
JournalSolid State Communications
Issue number6
StatePublished - 1 Jan 1996


  • A. high-t superconductors
  • A. thin films
  • D. Noise
  • D. flux pinning and creep

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics
  • Materials Chemistry


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