Ji. Martin et al., FLUX-FLOW RESISTIVITY AND VORTEX VISCOSITY OF HIGH-T-C FILMS NEAR T-C, Physical review. B, Condensed matter, 55(9), 1997, pp. 5659-5662
The flux-flow regime of high-T-c samples of different normal-state res
istivities is studied in the temperature range where the sign of the H
all effect is reversed. The scaling of the vortex viscosity with norma
l-state resistivity is consistent with the Bardeen-Stephen theory. Est
imates of the influence of possible mechanisms suggested for the sign
reversal of the Hall effect an also given.