Abstract
FeCo alloy nanoparticles encapsulated in the carbon matrix of metal–carbon nanocomposites have been manufactured under IR heating. The size of FeCo nanoparticles have been found to be tailored by varying synthesis temperature and metal concentration. The saturation magnetization has been shown to increase as the synthesis temperature or metal concentration rises, with an attendant decrease in coercive force. The electromagnetic properties of FeCo/C nanocomposites have been studied. Complex magnetic permittivity measurements have shown that variation of the synthesis temperature or metal concentration can appreciably increase magnetic loss, which leads to a shift of the band of minimum electromagnetic reflectivity in the frequency range 3–12 GHz.
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