Magnetic properties of hydrothermally synthesized Ba_(1-x)Sr_xFe_(12)O_(19) (x=0.0-0.8) nanomaterials

摘要

Barium strontium hexaferrite (BSFO) nanomaterial compositions were prepared using hydrothermal technique. The phase identification of BSFO revealed the hexagonal structure. The field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) techniques were used to study the surface morphology of BSFO nanostructures. TEM study showed the presence of distorted spheres like nanostructures of size 7-28 nm. Furthermore, the presence of metal oxides (Ba-O, Sr-O, and Fe-O) and functional groups were detected using Fourier transform infrared spectra (FTIR). Subsequently, magnetic nature of BSFO was confirmed using magnetization-magnetic field (M-H) and magnetic permeability-temperature (mu(i)-T) plots. The mu(i)-T plots suggested the enhancement of T-c from 703 K-753 K as a function of Sr-content (x). In addition, the variation of mu(i), magnetic loss (mu '') as well as relative magnetic loss factor (rlf: tan delta/mu(i)) with respect to the frequency was performed for probable transformer and inductor core device applications.