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Calculation of Electromagnetic Constitutive Parameters of Insulating Magnetic Materials with Conducting Inclusions

Published online by Cambridge University Press:  10 February 2011

Drs. Eric Kuster ,
Rick Moore ,
Lisa Lust  and
Paul Kemper
Rick Moore
Affiliation:
Signature Technology Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, GA 30332(ricky.moore@gtri.gatech.edu)
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Abstract

A Method of Moments (MoM) electromagnetic model of percolating conducting films was applied to calculate the effective parameters of the composite formed by conducting inclusions placed within a dispersive magnetic but nondispersive dielectric matrix. The MoM calculations demonstrate a coupling between the magnetic properties of the matrix and the effective composite permittivity and frequency dispersion of the composite. The coupling of permittivity and permeability is observed near the percolation threshold of the composite and for high conductivity inclusions. The prediction agrees with physical expectations since near percolation the conduction correlation length dominates the effective permittivity of the composite and this correlation length is determined by both the permittivity and permeability of the composite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 408: Symposium P – Materials Theory, Simulations, and Parallel Algorithms , 1995 , 527
Copyright
Copyright © Materials Research Society 1996

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