The striking similarity of ac conduction in quite different disordered solids is discussed in
terms of experimental results, modeling, and computer simulations. After giving an overview …

ac impedance measurements of ion-conducting glasses provide considerable insight into
the nature of the ionic motions in disordered solids. However, interpreting the ac impedance …

Over the past two decades percolation theory has been used to explain and model a wide
variety of phenomena that are of industrial and scientific importance. Examples include …

The dc and ac conductivities of carbon nanotubes− polyepoxy composites have been
investigated from 20 to 110° C in the frequency range 10-2− 106 Hz as a function of the …

The electrical properties of Ni 0.27 Cu 0.10 Zn 0.63 Fe 2 O 4 (NCZF) prepared from auto
combustion synthesis of ferrite powders have been studied by impedance and modulus …

Charge transport properties, such as the temperature dependent dc conductivity and the
frequency dependent conductance, of polymer matrix–metal particles composites, are …

Polycrystalline samples of a layered magnetic ceramic oxide, Ba 2 Co 2 Fe 12 O 22 (Co 2
Y), doped with Bi 2 O 3 were prepared by the solid state reaction method. The dielectric …

Recent scaling results for the ac conductivity of ionic glasses by Roling et al.[Phys. Rev. Lett.
78, 2160 (1997)] and Sidebottom [Phys. Rev. Lett. 82, 3653 (1999)] are discussed. We prove …

Arguments in favor of the electric modulus formalism are reviewed, and several
misunderstandings and misrepresentations are corrected. It is argued that different …

The electrical conductivity of NaNO3–xAl2O3 composites has been studied over the wide
range of temperature and frequency by means of impedance spectroscopy. The real part of …