Abstract
Abstract Two-point low frequency impedance measurements of microstrip transmission lines, fabricated from high quality, melt textured, thick YBCO +10 wt%Ag films and lower quality, melt textured, thick YBCO +10 wt%Au films on YSZ substrates, have provided intrinsic properties for these granular thick films. Weak-coupling between a thick Au doped YBCO line under measurement and a very similar parallel coplanar line carrying either high frequency currents or a d.c. current gave rise to unexpected changes in both the resistance and reactance of the microstripline near Tc. Analysis of the film conducting path in terms of parallel conductance and susceptance components gives a temperature dependence very similar to the susceptibility curves obtained from bulk YBCO material and their observed structure may be interpreted in terms of a granular model.
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