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.
@article{arxiv.cond-mat/9912282,
title = {Magnetic relaxation in the "Bragg-glass" phase in BSCCO},
author = {C. J. van der Beek and S. Colson and M. Konczykowski and M. V. Indenbom and R. J. Drost and P. H. Kes},
journal= {arXiv preprint arXiv:cond-mat/9912282},
year = {2015}
}
Comments
2 pages, 3 figures submitted to conference proceedings of M2S-2000 Houston TX