Measurement of the ac power loss of (Bi,Pb)2Sr2Ca2Cu3O<i>x</i> composite tapes using the transport technique

Abstract

The transport self-field ac loss voltages of (Bi,Pb)2Sr2Ca2Cu3Ox (Bi-2223) multifilamentary tapes depend strongly on the voltage lead configuration. We have measured the loss voltage as a function of the measuring circuit loop size defined by the voltage leads and the tapes for well-defined lead geometries. The loss signal was found to reach a limiting value when the length of the loop transverse to the tape was several times the tape width. This limiting voltage represents the ‘‘true’’ self-field ac loss as predicted by new theoretical analysis.