Abstract
BaFe12-xTixO19 hexaferrites up to x = 2.00 were fabricated in an
ordinary ceramic way. Crystal structure parameters were isothermally
defined at 300 K from the powder XRD by the Rietveld technique. The cell
constants have nonmonotonic concentration dependence with a local
minimum of a similar to 5.886 angstrom and V similar to 698.75 angstrom(3) at x = 1.00. The occupation mechanism of the titanium
cations is confirmed. The Mossbauer investigation confirms such
localization of Ti4+. Magnetization vs field measurements were realized
at 300 K. The law of approach to saturation (LAS) was applied to
determine the magnetic loop characteristics. These values decrease
almost monotonically with an increase in titanium concentration and temperature. The minimum magnetic values were obtained for x = 2.00 at
300 K. Ac resistivity had a nonmonotonic growth dependence. Minimum ac resistivity was fixed for x = 0.50 at 300 K. As the frequency increases,
the ac resistivity decreases, as the value of the band gap. The real
part of permittivity epsilon' rises constantly with increasing
temperature and falls with frequency increase for all of the
compositions. Changes in the structure, magnetization, and ac
resistivity of BaFe12-xTixO19 were made on the basis of changing charged
states of iron ions and the occupation mechanism by titanium ions.
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