Magnetic properties enhancement of M-Ba ferrites embedded in a Sio2 matrix
2018
M–Ba ferrite powders prepared by the coprecipitation method were embedded,
using the sol–gel technique, in an inert silica xerogel matrix. Samples were analysed by
X-ray diffraction and vibrating sample magnetometry. We compare the magnetic and
structural properties of pure ferrite samples and those embedded in the inorganic
matrix. The mixed samples had a proportion of 30% BaFe12O19:70% SiO2 in weight. We
observed an enhancement of the coercive force in ferrite powders, embedded in the
SiO2 matrix, accompanied by a decrease of the saturation magnetization, with respect
to pure samples.
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