This article is cited in 5 papers

Dielectrics

Dielectric losses in statistical mixtures

A. V. Turik, S. I. Garmashov

Southern Federal University, Rostov-on-Don

Abstract: The specific features of the dielectric spectra of statistical mixtures in the form of heterogeneous systems with spherical particles chaotically arranged in the space have been investigated. The distribution function of relaxation times $f(\tau)$ has been restored. It has been established that the relaxation times are continuously distributed within a wide interval $[\tau_1,\tau_2]$. Different methods for broadening the relaxation time distribution interval and approximating the relaxation time distribution function $f(\tau)$ have been analyzed. It has been demonstrated that $f(\tau)$ is a nonmonotonic function with two maxima at the boundaries and a minimum in the vicinity of the midpoint of the interval $[\tau_1,\tau_2]$. These features of the relaxation time distribution function are responsible for the large difference between the average relaxation frequencies of the permittivity and the dielectric loss (electrical conductivity).

Received: 09.11.2010

 English version: Physics of the Solid State, 2011, 53:6, 1194–1197

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