TITLE

Microwave absorption in percolating metal-insulator composites

AUTHOR(S)
Zimmerman, D. T.; Cardellino, J. D.; Cravener, K. T.; Feather, K. R.; Miskovsky, N. M.; Weisel, G. J.
PUB. DATE
November 2008
SOURCE
Applied Physics Letters;11/24/2008, Vol. 93 Issue 21, p214103
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
35605047

 

Related Articles

  • Metal-Insulator Transition in NaxWO3 : Photoemission Spectromicroscopy Study. Paul, Sanhita; Ghosh, Anirudha; Raj, Satyabrata // AIP Conference Proceedings;2014, Vol. 1591, p1145 

    We have investigated the validity of percolation model, which is quite often invoked to explain the metalinsulator transition in sodium tungsten bronzes, NaxWO3 by photoelectron spectromicroscopy. The spatially resolved direct spectromicroscopic probing on both the insulating and metallic phases...

  • Nonlinear percolation near a metal�insulator transition in regular textures. Satanin, A. M.; Khor�kov, S. V.; Skuzovatkin, V. V. // JETP Letters;4/10/97, Vol. 65 Issue 7, p544 

    Current percolation in weakly nonlinear two-dimensional periodic structures near a metal�insulator transition is studied. It is shown that the nonlinear conductivity exhibits critical behavior as a function of the density of the insulating and superconducting inclusions. The possibility of...

  • Effective medium at finite frequency: Theory and experiment. Rousselle, D.; Berthault, A.; Acher, O.; Bouchaud, J. P.; Zérah, P. G. // Journal of Applied Physics;7/1/1993, Vol. 74 Issue 1, p475 

    Deals with an effective medium theory at finite frequency. Permeability of microspheres of Permalloy in an insulator matrix; Extraction of the intrinsic permeability of the permalloy inclusion; Evidence of the breakdown of the long wavelength approximation for the description of metal-insulator...

  • Metal-insulator transition induced by fluctuations of the magnetic potential in semiconductors with magnetic impurities. Meilikhov, E. Z.; Farzetdinova, R. M. // Journal of Applied Physics;Mar2011, Vol. 109 Issue 5, p053906 

    We investigate the metal-insulator transition occurring in semiconductors with magnetic impurities when lowering temperature. In contrast to the usually considered percolation transition in the nonuniform medium induced by the localization of charge carriers in the fluctuating electric...

  • Arbitrary Super Surface Modes Bounded by Multilayered Metametal. Ruoxi Yang; Xiaoyue Huang; Zhaolin Lu // Micromachines;Mar2012, Vol. 3 Issue 1, p45 

    The dispersion of the fundamental super mode confined along the boundary between a multilayer metal-insulator (MMI) stack and a dielectric coating is theoretically analyzed and compared to the dispersion of surface waves on a single metal-insulator (MI) boundary. Based on the classical...

  • Transition Radiation of Surface Electromagnetic Waves by Electron Bunches in a Cylindrical Waveguide. Averkov, Yu. O. // Technical Physics;Aug2005, Vol. 50 Issue 8, p1058 

    Transition surface electromagnetic radiation from electron bunches that cross a metal–insulator–semiconductor structure in a perfectly conducting semi-infinite cylindrical waveguide is studied. It is shown that, using a periodic sequence (train) of electron bunches, a particular...

  • Fragility and thermodynamics in nonpolymeric glass-forming liquids. Li-Min Wang; Angell, C. Austen; Richert, Ranko // Journal of Chemical Physics;8/21/2006, Vol. 125 Issue 7, p074505 

    For nonpolymeric supercooled liquids, the empirical correlation m=56TgΔCp(Tg)/ΔHm provides a reliable means of correlating dynamic and thermodynamic variables. The dynamics are characterized by the fragility or steepness index m and the glass transition temperature Tg, while...

  • Electromagnetic Properties of W - Hexaferrites Composites with Magnetic Texture. Wagner, Dmitry V.; Dotsenko, Olga A.; Ulyanova, Olga A. // Advanced Materials Research;2014, Issue 1040, p29 

    In this article the possibility of production of composite materials with magnetic texture are discussed. For texturing of magnetic polymer materials the device was made. The W-type hexaferrites were synthesized using a standard ceramic technique. Magnetic materials with a texture based on...

  • Preparation and properties of the trivalent-ion doped tungsten bronze LaxWO3. Kasl, C.; Hoch, M. J. R. // Journal of Applied Physics;3/15/2006, Vol. 99 Issue 6, p063711 

    The production and characterization of lanthanum-doped tungsten oxide, LaxWO3, sintered samples are presented for 0.05<=x<=0.23. The x-ray diffraction results show that the cubic perovskite phase is stable for x in the range of 0.086–0.21. Outside of this range additional phases are...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics