BF IMPEDANCE OF HIGH-T-C CUPRATES

Surface impedance of a high-T-c superconductor (HTS) is described in t erms of equivalent lumped-circuit elements, i.e. resistance and induct ance, based on the concept of the complex conductivity of a hard type II superconductor containing ureal links (WLs), modelled as a parallel combination of a pure superconducting branch and a branch containing WLs.