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

Abstract

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
Volume98
Issue number6
DOIs
StatePublished - May 1996

Bibliographical note

Funding Information:
work was supportedb y the Ministry of Sciencea nd Arts of

Funding

work was supportedb y the Ministry of Sciencea nd Arts of

FundersFunder number
Ministry of Sciencea nd Arts of

    Keywords

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

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