Absorption mechanisms Adsorbents Dielectric materials Electric network analyzers Electrospinning Field emission scanning electron microscopes Fourier transform infrared spectroscopy Iron oxides Magnetite Microwave absorption Microwave absorption properties Microwaves Morphology Nanofiber composites Nanofibers Nanomagnetics Nanoparticles Protective materials Scanning electron microscopy Transmission electron microscopy Vector network analyzers X ray diffraction X-ray diffraction spectrum