Title :
Microwave electromagnetic response of granular two-phase nanocomposites
Author :
Brosseau, C. ; Talbot, P.
Author_Institution :
Univ. de Bretagne Occidentale, Brest
Abstract :
In this paper, we present systematic effective permeability measurements of magnetically structured granular systems composed of magnetic grains embedded in a nonmagnetic matrix using broadband microwave spectroscopy. Using the transmission/reflection waveguide method, the effective complex permeability was measured in the frequency range of 0.01-10 GHz. The results are compared for composites consisting of micrometer-sized (type M) and nanometer-sized (type N) Co and Ni particles embedded in a ZnO matrix.
Keywords :
cobalt; granular materials; magnetic permeability; microwave spectra; nanocomposites; nanoparticles; nickel; zinc compounds; Co-ZnO; Ni-ZnO; broadband microwave spectroscopy; effective complex permeability; frequency 0.01 GHz to 10 GHz; granular two-phase nanocomposites; magnetic grains; magnetically structured granular systems; micrometer-sized particles; microwave electromagnetic response; nanometer-sized particles; nonmagnetic matrix; reflection waveguide method; transmission waveguide method; Electromagnetic devices; Frequency; Magnetic properties; Microwave devices; Nanocomposites; Nanostructures; Permeability measurement; Resonance; Transmission line matrix methods; Zinc oxide;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.376235
