Diverging time scales for onset of irreversibility in high-temperature superconductors

Y. Wolfus, Y. Abulafia, L. Klein, V. A. Larkin, A. Shaulov, Y. Yeshurun, M. Konczykowski, M. Feigel'man

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26 Citations (Scopus)

Abstract

The onset temperature, Tirr, for magnetic irreversibility in high-temperature superconductors has been investigated as a function of frequency (0.2 Hz≤f≤65 000 Hz) and DC magnetic field (0<H<4000 Oe). In Y-Ba-Cu-O crystals Tirr is essentially independent of the frequency, while in Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O crystals Tirr exhibits a strong frequency dependence. For all three systems Tirr(H) converges to a finite temperatureas the frequency approaches zero. Analysis of the experimental data shows that conventional theories of thermally-activated vortex motion cannot explain the measured frequency dependence of Tirr. Rather, the data indicate that Tirr for f→0 can be interpreted as a transition temperature separating the reversible vortex-liquid and the irreversible vortex-glass phases.

Original languageEnglish
Pages (from-to)213-220
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume224
Issue number3-4
DOIs
Publication statusPublished - 1 May 1994
Externally publishedYes

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