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

• Published in: Journal of superconductivity and novel magnetism Vol. 25; no. 5; pp. 1485 - 1488
• Main Author: Topal, Ugur
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.07.2012; Springer
• Subjects: Barium compounds; Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Demagnetization; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Ferrites; Hydrochloric acid; Magnetic Materials; Magnetic properties and materials; Magnetism; Magnetization; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Mathematical models; Original Paper; Physics; Physics and Astronomy; Remanence; Strongly Correlated Systems; Superconductivity; Oxides; Magnetic materials; Magnetic properties; Magnetization; Particle interactions; Doping; Boron additions; Calcination; Magnetic hysteresis; Chemical etching; Barium ferrites; Exchange interactions
• ISSN: 1557-1939; 1557-1947
• DOI: 10.1007/s10948-012-1486-4

In the present study, we investigate influence of HCl-etching on magnetic parameters of B 2 O 3 -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% B 2 O 3 -doped and HCl-washed one after calcination at 1000 °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.