%0 Journal Article
%T Magnetic relaxation in the "Bragg-glass" phase in BSCCO
%A C. J. van der Beek
%A S. Colson
%A M. Konczykowski
%A M. V. Indenbom
%A R. J. Drost
%A P. H. Kes
%J Physics
%D 1999
%I arXiv
%R 10.1016/S0921-4534(00)00891-1
%X Magnetic relaxation in the Bragg-glass phase of overdoped Bi_2Sr_2CaCu_2O_8 crystals was investigated using time-resolved magneto-optical visualisation of the flux distribution. This has permitted us to extract the current-voltage characteristic, which can be well described by a power-law, although fits to a stretched exponential E \sim \exp(- j_{c} / j)^{\mu} with 0.3 < \mu < 0.8 are possible at long times in excess of 100 s.
%U http://arxiv.org/abs/cond-mat/9912282v2