Analyzing Impedance Spectroscopy Results

Abstract: In this contribution we briefly discuss several anal. techniques for impedance spectroscopy expts. A no. of different approaches, which differ even by the definition of the problem, are used in the literature. Some aimed towards finding an equiv. circuit. Others aimed towards finding directly dielec. properties of the material under an assumed model. Others towards finding distribution of relaxation times, either parametric or point-by point. No matter what the approach is, this will always be an ill-posed problem in the sense that there exist a large no. of possible solns. that solve the problem (math.) equally well. Therefore some a-priori knowledge about the system must be used. In addn., we should remember that the ultimate goal is to get phys. insight about the system.

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