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Dielectric Relaxation in Biological SystemsPhysical Principles, Methods, and Applications$
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Valerica Raicu and Yuri Feldman

Print publication date: 2015

Print ISBN-13: 9780199686513

Published to Oxford Scholarship Online: August 2015

DOI: 10.1093/acprof:oso/9780199686513.001.0001

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Elementary Theory of the Interaction of Electromagnetic Fields with Dielectric Materials

Elementary Theory of the Interaction of Electromagnetic Fields with Dielectric Materials

Chapter:
(p.32) (p.33) 1.1 Elementary Theory of the Interaction of Electromagnetic Fields with Dielectric Materials
Source:
Dielectric Relaxation in Biological Systems
Author(s):

Yuri Feldman

Paul Ben Ishai

Alexander Puzenko

Valerică Raicu

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199686513.003.0002

This chapter presents a brief introduction to the modern theory of dielectrics. The different polarization mechanisms in static and time-dependent fields are discussed and the complex dielectric permittivity and conductivity representations are introduced. The simplest case of the Debye dispersion and different phenomenological non-exponential functions, both in the frequency and time domain, are discussed in detail. The different models of dielectric relaxation are considered, including diffusion and transport in complex dielectrics. The chapter concludes with a discussion of the modern interpretation of the non-Debye relaxation behavior on the basis of anomalous diffusion and percolation theory in fractal lattices.

Keywords:   complex dielectric permittivity, complex conductivity, dispersion functions, dipole correlation function, polarization, dielectric relaxation, rotational diffusion, percolation

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