Microwave absorption in percolating metal-insulator composites

D. T. Zimmerman, J. D. Cardellino, K. T. Cravener, K. R. Feather, N. M. Miskovsky, G. J. Weisel

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We measure several electromagnetic properties of tungsten-Teflon composites as a function of metal volume concentration. The electric (E) and magnetic (H) loss tangents at 2.45 GHz and the dc conductivity each exhibits a percolation transition at a different critical value of the metal volume fraction p. Moreover, the transition behavior depends on the average particle size and size distribution of the metal component. We explain the variation in each case by a schematic model derived from established percolation theory and the distinct response of conducting particles to microwave electric and magnetic fields.

Original languageEnglish (US)
Article number214103
JournalApplied Physics Letters
Volume93
Issue number21
DOIs
StatePublished - Dec 8 2008

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microwave absorption
insulators
composite materials
metals
electromagnetic properties
teflon (trademark)
circuit diagrams
tangents
tungsten
microwaves
conduction
conductivity
electric fields
magnetic fields

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Zimmerman, D. T., Cardellino, J. D., Cravener, K. T., Feather, K. R., Miskovsky, N. M., & Weisel, G. J. (2008). Microwave absorption in percolating metal-insulator composites. Applied Physics Letters, 93(21), [214103]. https://doi.org/10.1063/1.3036900
Zimmerman, D. T. ; Cardellino, J. D. ; Cravener, K. T. ; Feather, K. R. ; Miskovsky, N. M. ; Weisel, G. J. / Microwave absorption in percolating metal-insulator composites. In: Applied Physics Letters. 2008 ; Vol. 93, No. 21.
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Zimmerman, DT, Cardellino, JD, Cravener, KT, Feather, KR, Miskovsky, NM & Weisel, GJ 2008, 'Microwave absorption in percolating metal-insulator composites', Applied Physics Letters, vol. 93, no. 21, 214103. https://doi.org/10.1063/1.3036900

Microwave absorption in percolating metal-insulator composites. / Zimmerman, D. T.; Cardellino, J. D.; Cravener, K. T.; Feather, K. R.; Miskovsky, N. M.; Weisel, G. J.

In: Applied Physics Letters, Vol. 93, No. 21, 214103, 08.12.2008.

Research output: Contribution to journalArticle

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Zimmerman DT, Cardellino JD, Cravener KT, Feather KR, Miskovsky NM, Weisel GJ. Microwave absorption in percolating metal-insulator composites. Applied Physics Letters. 2008 Dec 8;93(21). 214103. https://doi.org/10.1063/1.3036900