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Title: Negative permittivity and permeability spectra of Cu/yttrium iron garnet hybrid granular composite materials in the microwave frequency range

The relative complex permittivity and permeability spectra of the coagulated copper and yttrium iron garnet (Cu/YIG) hybrid granular composite materials have been studied in the microwave range. The insulator to metal transition was observed at the percolation threshold of Cu particle content (φ{sub Cu} = 16.0 vol. %) in the electrical conductivity. In the percolation threshold, the low frequency plasmonic state caused by the metallic Cu particle networks was observed. The percolated Cu/YIG granular composites show simultaneous negative permittivity and permeability spectra under external magnetic fields.
Authors:
; ;  [1] ;  [2] ; ;  [3]
  1. Graduate School of Education, Hiroshima University, 1-1-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8524 (Japan)
  2. Tokuyama College of Technology, Gakuendai, Shunan, Yamaguchi 745-8585 (Japan)
  3. Graduate School of Engineering, University of Hyogo, Syosha, Himeji 671-2201 (Japan)
Publication Date:
OSTI Identifier:
22253208
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 26; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; COPPER; ELECTRIC CONDUCTIVITY; FERRITE GARNETS; FREQUENCY RANGE; IRON OXIDES; MAGNETIC FIELDS; MICROWAVE RADIATION; PARTICLES; PERMEABILITY; PERMITTIVITY; SPECTRA; YTTRIUM; YTTRIUM COMPOUNDS