Abstract
A novel magnetic nanocomposite of multiwalled carbon nanotubes decorated with SrFe8MgCoTi2O19 nanoparticles have been prepared by a chemical co-precipitation method. The structural, magnetic and electromagnetic properties of samples were studied as a function of volume percentage of MWCNTs by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, vibrating sample magnetometer and vector network analysis. The XRD and FTIR results showed that the nanocomposites were synthesized successfully. Field emission scanning electron microscopy micrographs demonstrated that homogeneous and high level of dispersion of MWCNTs and Sr-hexaferrite nanoparticles in nanocomposite samples were obtained. The saturation magnetization of the nanocomposite samples was found to decrease by an increase in volume percentage of MWCNTs up to 5vol%. The vector network analysis results show that the highest value of reflection loss of nanocomposite was −42.43dB at 11.13GHz with an absorption bandwidth of more than of 4GHz. The results indicate that, these novel types of nanocomposites with appropriate amount of MWCNTs hold great promise for microwave device applications.
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