Simulation of artificial magnetic materials using lattices of loaded molecules

James Aberle, David A. Buchanan, William E. McKinzie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Presented 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 three dimensional 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 (μ τ → ∞) below which the media is paramagnetic (μ τ>1) and above which the media is diamagnetic (μ τ<1). Resonant frequency, and magnetic permeability, can be adjusted by controlling the load capacitance.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages188-196
Number of pages9
Volume3795
StatePublished - 1999
EventProceedings of the 1999 Terahertz and Gigahertz Photonics - Denver, CO, USA
Duration: Jul 19 1999Jul 23 1999

Other

OtherProceedings of the 1999 Terahertz and Gigahertz Photonics
CityDenver, CO, USA
Period7/19/997/23/99

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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