Permittivity of lossy heterostructures: effects of finite conductivity and anisotropy
作者： A. Boudida , A. Beroual , C. Brosseau
DOI: 10.1109/ELINSL.1998.694838
关键词: Condensed matter physics 、 Percolation theory 、 Permittivity 、 Dielectric 、 Percolation threshold 、 Percolation 、 Scaling 、 Dielectric loss 、 Anisotropy 、 Materials science
摘要: The complex values of the permittivity two-component lossy heterostructures, composed inclusions /spl epsiv//sub 1/ embedded in a host matrix 2/, are rigorously evaluated with use finite element method and code FLUX3D. Numerical results concerning spherical rodlike various radius-to-length ratios, conductivity, periodically arranged simple cubic lattice configuration provided. For illustrative purpose, single set permittivities was investigated: 1/=80-i10/sup 6/ 2/=2-i0. percolation threshold volume concentration is strongly dependent on inclusion shape. Increasing ratio by one order magnitude has effect shifting upwards two decades. exponents which determine how real imaginary parts effective scale distance from determined compared scaling predictions theory for infinite three-dimensional lattices insulator-normal metal composite systems.
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