Thermally-activated vortex dynamics in bismuth calcium strontium copper oxide (Bi2CaSr2Cu2O8+δ) studied by complex susceptibility measurements

J.H.P.M. Emmen, V.A.M. Brabers, W.J.M. Jonge, de

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33 Citations (Scopus)

Abstract

Complex AC magnetic susceptibility has been measured on Bi2CaSr2Cu2O8+d single crystals with hnc, Hdc|c-axis. It will be shown that field, frequency and temperature dependence of both ¿' and ¿¿ in a constant but sufficiently large DC magnetic field can quantitatively be described by thermally-activated flux flow (TAFF) provided that a narrow distribution of activation energies is implemented. From the frequency dependence of the AC¿ transition, a power law for the DC field dependence of the activation energy has been found, with an exponent -1/4.
Original languageEnglish
Pages (from-to)137-146
Number of pages10
JournalPhysica C : Superconductivity
Volume176
Issue number1-3
DOIs
Publication statusPublished - 1991

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