The dielectric resonance and multiple magnetic resonances which correspond to multiple microwave absorptions in the 2-18 GHz range have been studied in the composite Fe/TiO(2). The Fe grain size is found to have great impact on the dielectric resonance in this metal-semiconductor composite. The polarization mechanism is attributed to interfacial polarization. The multiple magnetic resonances can be ascribed to the natural resonance and exchange resonances, which can be explained by Aharoni's exchange resonance theory. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3496393]
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