We study the problem of the time decay of magnetic states in type-II superconductors by starting from the general expression of the Arrhenius formula as derived from classical stochastic mechanics. By appropriately writing the potential energy for a fluxon in the presence of a pinning center, we find that the attempt frequency in the Arrhenius formula depends on the current density J in such a way that the dissipation phenomena due to creep mechanisms approach zero for vanishing values of J.
Modified Arrhenius formula for the time decay of magnetic states in type II superconductors
PACE, Sandro;DE LUCA, Roberto;POLICHETTI, Massimiliano
1997-01-01
Abstract
We study the problem of the time decay of magnetic states in type-II superconductors by starting from the general expression of the Arrhenius formula as derived from classical stochastic mechanics. By appropriately writing the potential energy for a fluxon in the presence of a pinning center, we find that the attempt frequency in the Arrhenius formula depends on the current density J in such a way that the dissipation phenomena due to creep mechanisms approach zero for vanishing values of J.File in questo prodotto:
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