Magnetic relaxation in hard type-II superconductors

Details Magnetic relaxation in hard type-II superconductors Magnetic relaxation in hard type-II superconductors

2000-01-11

arxiv.org/abs/cond-mat/0001131v1

Europhys. Lett. Vol. 49 (4), 494-500 (2000).

Physics

Condensed Matter

Superconductivity

7 Pages (in Europhys format, .sty included), 5 Figures. To appear in Europhysics Letters

Scientific paper

10.1209/epl/i2000-00176-1

Magnetic relaxation in a type-II superconductor is simulated for a range of temperatures (T) in a simple model of 2D Josephson junction array (JJA) with finite screening. The high-T phase, that is characterised by a single time scale \tau_{\alpha}, crosses over to an intermediate phase at a lower temperature T_{cr} wherein a second time scale \tau_{\beta}<<\tau_{\alpha} emerges. The relaxation in the time window set by \tau_{\beta} follows power law which is attributed to self-organization of the magnetic flux during relaxation. Consequently, for TJ_{c}) to sub-critical (J

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