Towards Further Improvements of the Magnetization Parameters of B2O3-Doped BaFe12O19 Particles: Etching with Hydrochloric Acid

In the present study, we investigate influence of HCl-etching on magnetic parameters of B2O3-doped M-type barium ferrites. Our studies have shown that magnetization parameters; the remanence magnetization M (r) and the specific magnetization M (s) at 1.5 T, increase significantly with HCl-etching. The best magnetic parameters were observed in the sample of 0.1 wt% B2O3-doped and HCl-washed one after calcination at 1000 A degrees C (M (r) =34.9 emu/g, M (s) =0.63.3 emu/g). Increments up to 50% in magnitudes could be achieved with HCl washing. Exchange interactions between particles were also examined by Wohlfarth model. It was observed that magnetizing-like interactions between particles become stronger but ,on the other hand, demagnetizing-like interactions becomes weaker with HCl-etching.