THE SCALING OF THE R(T) RESPONSE IN BSCCO (2212) FILMS AT LOW MAGNETIC FIELDS

Abstract

The ratio V/I in three BSCCO (2212) films is studied at low magnetic fields (0.5-300 G). In the field-dependent region the data of R vs. Θ=[T-To(H))]/[Tm-To(H))] overlap on one line, where To(H) and Tm(H) are the limits of the process. The result is similar to the R(T,I) dependence in several planar superconductors and this coincidence indicates that low current and field play the same role in the dissipation of these materials. The R(T,I,H) dependence is approximated by R=Ro exp (- b /Θ0.5), suggesting that in these conditions the dissipation may be attributed to a single process due to the de-pairing of thermally excited vortex-antivortex pairs.