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Proceedings Paper

Simulation of artificial magnetic materials using lattices of loaded molecules
Author(s): James T. Aberle; David A. Buchanan; William E. McKinzie III
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Paper Abstract

Present are numerical studies of the magnetic permeability for arrays of artificial magnetic molecules simulated using a time domain TLM code. These artificial magnetic materials consist of a 3D periodic lattice of electrically small loaded loops suspended in a non-magnetic host medium. For this class of artificial magnetic media, we demonstrate good agreement between the permeability computed using a simple circuit theory model, and that computed using a full wave TLM simulation. This close agreement suggests that the salient physics for this type of artificial magnetic media may be well modeled using simple lumped equivalent circuits. A closed form expression is derived for the effective media permeability as a function of the molecular circuit loads. When molecules are uniformly loaded with lossless capacitors, the artificial media exhibits a Lorentzian response with a resonance ((mu) r yields (infinity) ) below which the media is paramagnetic ((mu) r > 1) and above which the media is diamagnetic ((mu) r < 1). Resonant frequency, and magnetic permeability, can be adjusted by controlling the load capacitance.

Paper Details

Date Published: 12 November 1999
PDF: 9 pages
Proc. SPIE 3795, Terahertz and Gigahertz Photonics, (12 November 1999); doi: 10.1117/12.370162
Show Author Affiliations
James T. Aberle, Arizona State Univ. (United States)
David A. Buchanan, Atlantic Aerospace Electronics Corp. (United States)
William E. McKinzie III, Atlantic Aerospace Electronics Corp. (United States)

Published in SPIE Proceedings Vol. 3795:
Terahertz and Gigahertz Photonics
R. Jennifer Hwu; Ke Wu, Editor(s)

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