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Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe12-xHgxO19 Hexaferrite Nanoparticles Prepared by Co-Precipitation Method
Journal of Taibah University for Science ( IF 2.8 ) Pub Date : 2020-05-12 , DOI: 10.1080/16583655.2020.1761676
M.ME. Barakat 1, 2 , D. El-Said Bakeer 3, 4 , Abdel-Hamed Sakr 4
Affiliation  

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 Ms, remnant magnetization Mr and magnetic moment mB 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.



中文翻译:

共沉淀法制备BaFe12-xHgxO19六方铁氧体纳米粒子的结构,磁性能和电子顺磁共振

通过共沉淀技术在不同的退火温度下合成了六价铁酸钡纳米粒子。在最佳验证条件下(在1000°C退火)制备0.00≤x≤0.30的一系列BaFe 12-x Hg x O 19纳米颗粒,以研究Hg 2+离子部分取代对BaFe物理性质的影响12 O 19纳米粒子。室温下的磁滞回线显示出硬铁磁的行为。饱和磁化强度的估计值中号s,剩余磁化强度 中号[R 和磁矩 当Hg 2+离子含量增加到x = 0.10时,离子浓度会上升,在此之后它们会减少。对于固有矫顽力Hi和矫顽力Hc相对于Hg 2+离子含量,获得了相反的趋势。通过电子顺磁共振(EPR)的测量研究了BaFe 12-x Hg x O 19纳米粒子。计算得出的EPR参数显示BaFe 12-x Hg x O 19纳米粒子的增强作用,最高x = 0.10。获得的结果表明,所研究的样品可以适合于不同的工业应用。

更新日期:2020-05-12
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