Flux creep and current relaxation in high-Tc superconductors
M. V. Feigel’man, V. B. Geshkenbein, V. M. Vinokur
DOI 10.1103/PhysRevB.43.6263 · Physical Review B
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Abstract
The long-time asymptotics of the current (magnetization) relaxation in high-temperature superconductors is studied within the framework of collective creep theory. The inverse normalized relaxation rate S−1 depends linearly on Tln(t/τ0). The attempt time τ0 is shown to be much longer than a ‘‘microscopic’’ time scale and is strongly size and jc dependent.
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