NDLI: Permittivity of lossy heterostructures: effects of finite conductivity and anisotropy

Content Provider	IEEE Xplore Digital Library
Author	Boudida, A. Beroual, A. Brosseau, C.
Copyright Year	1998
Description	Author affiliation: Centre de Genie Electr. de Lyon, Ecole Centrale de Lyon, Ecully, France (Boudida, A.)
Abstract	The complex values of the permittivity of two-component lossy heterostructures, composed of inclusions of permittivity /spl epsiv//sub 1/ embedded in a host matrix of permittivity /spl epsiv//sub 2/, are rigorously evaluated with use of the finite element method and the code FLUX3D. Numerical results concerning spherical and rodlike inclusions with various radius-to-length ratios, of finite conductivity, periodically arranged in a simple cubic lattice configuration are provided. For illustrative purpose, a single set of permittivities was investigated: /spl epsiv//sub 1/=80-i10/sup 6/ and /spl epsiv//sub 2/=2-i0. The percolation threshold volume concentration is strongly dependent on the inclusion shape. Increasing the radius-to-length ratio by one order of magnitude has the effect of shifting upwards the percolation threshold by two decades. The exponents which determine how the real and imaginary parts of the effective permittivity scale with the distance from the percolation threshold are determined and are compared with the scaling predictions of percolation theory for infinite three-dimensional lattices of insulator-normal metal composite systems.
Starting Page	482
Ending Page	485
File Size	418234
Page Count	4
File Format	PDF
ISBN	078034927X
ISSN	1089084X
DOI	10.1109/ELINSL.1998.694838
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Permittivity Conductivity Anisotropic magnetoresistance Dielectrics Shape Metal-insulator structures Interconnected systems Optical fiber theory Finite element methods Lattices
Content Type	Text
Resource Type	Article

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