Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe12-xHgxO19 Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Abstract

Barium hexaferrite nanoparticles are synthesized through co-precipitation technique at different annealing temperature. Series of BaFe12-xHgxO19 nanoparticles, 0.00 ≤ x ≤ 0.30, are prepared under the best verified conditions (annealed at 1000°C) to investigate the effect of partial substitution of Hg2+ ions on the physical properties of BaFe12O19 nanoparticles. The hysteresis loops at room temperature show the behavior of hard ferromagnetic. The estimated values of saturation magnetization ${M_s} $, remnant magnetization ${M_r} $ and magnetic moment ${m_B} $ rise as Hg2+ ions content increases till x = 0.10, beyond which they reduce. A reverse trend is obtained for intrinsic coercivity Hi and coercivity Hc versus Hg2+ ions content. BaFe12-xHgxO19 nanoparticles are investigated through the measurements of electron paramagnetic resonance (EPR). The calculated EPR parameters show an enhancement for BaFe12-xHgxO19 nanoparticles up to x = 0.10. The obtained results reveal that samples under investigation can be suitable candidate for different industrial applications.

Keywords

• m-type hexagonal ferrites
• xrd
• tem
• epr
• co-precipitation