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Equivalence of Magnetic Metamaterials and Composites in the View of Effective Medium Theories

Szabó, Zsolt and Füzi, János (2014) Equivalence of Magnetic Metamaterials and Composites in the View of Effective Medium Theories. Magnetics, IEEE Transactions on, 50 (4). pp. 1-4.

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Abstract

The electromagnetic response of metamaterials is governed by the collective behavior of engineered electric and magnetic dipoles. Therefore metamaterials may be replaced by hypothetical composites of spherical particles embedded in a host material. The effective electric permittivity and magnetic permeability of such systems can be computed with high-frequency extension of the Maxwell-Garnett mixing rule. The validity of this assumption is discussed and the features of the model are presented by calculating the effective electromagnetic material parameters of a deep subwavelength spherical composite in three different ways: with the Maxwell-Garnett mixing rule, high-frequency mixing rule and directly extracted from transmission reflection data. Afterwards the developed theory is applied to find the parameters of a composite with similar magnetic response as a metamaterial built of split ring resonators or fishnet structures.

Item Type: Article
Uncontrolled Keywords: electromagnetic metamaterials;high-frequency effects;magnetic moments;magnetic particles;magnetic permeability;nanocomposites;nanomagnetics;nanoparticles;permittivity;Maxwell-Garnett mixing rule;collective behavior;deep subwavelength spherical composite;effective electric permittivity;effective electromagnetic material parameters;effective medium theories;electromagnetic response;engineered electric dipoles;engineered magnetic dipoles;fishnet structures;high-frequency extension;high-frequency mixing rule;hypothetical composites;magnetic metamaterials;magnetic permeability;spherical particles;split ring resonators;transmission reflection data;Magnetic materials;Magnetic resonance imaging;Metamaterials;Optical ring resonators;Permeability;Permittivity;Effective medium theory;metamaterials;nanocomposites
Subjects: Q Science / természettudomány > QC Physics / fizika > QC04 Electricity. Magnetism. Electromagnetism / villamosság, mágnesesség, elektromágnessesség
Depositing User: Dr. Zsolt Szabó
Date Deposited: 20 Sep 2014 16:44
Last Modified: 20 Sep 2014 16:44
URI: http://real.mtak.hu/id/eprint/15650

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