Effect of titanium substitution and temperature variation on structure and magnetic state of barium hexaferrites

A number of solid solutions based on BaFe12?xTixO19 M-type barium hexaferrite doped with titanium cations up to x = 2.00 were obtained using conventional ceramic technology. The phase composition, crystal structure and unit cell parameters refined by the Rietveld method powder X-ray diffraction data T 900 K. It was found that all compositions have a magnetoplumbite satisfactorily described P63/mmc space group (No. 194). With increasing temperature doping concentration, increase almost monotonically. minimum volume V ~ 696.72 Å3 determined for composition 1.00 at 100 K, while maximum value 714.00 is observed mechanism occupation nonequivalent crystallographic positions established. spin-glass component magnetic state fixed. Tdif difference between ZFC-FC curves decreases an in concentration field from ~237.2 K 44.5 Tinf inflection ZFC curve increases ~21.0 ~23.8 both Dav average Dmax clusters grow nm. As above critical value, disappears. For > 1.00, magnetization not saturated fields 6 T. Along formation component, lowers TC Curie down ~600 Ms spontaneous Mr remanent magnetizations, as well Bc coercivity, decrease monotonically, latter has point 1.00. values magnetization, are amount ~17.7 emu/g, ~1.9 ~3.9 × 10?3 T, respectively. An interpretation given taking into account cations.