Figure 3

Cole-Cole plot of complex impedance spectra.
(a) Spectra for run #5 showing the real vs. imaginary components of the complex impedance in the frequency range of 1 MHz to 100 or 20 Hz at room temperature and various pressures. The dashed lines indicate the spectra of the equivalent circuit. (b) Equivalent circuit consisting of an electrode contribution (R0), a sample contribution (R1, C1) and a parasitic contribution (R2,C2). (c) Rearranged equivalent circuit for the equivalent circuit in (b).