Synthesis and Characterization of High Coercivity Rare-earth Ion Doped
نویسنده
چکیده
Influence of replacing Sr ions by rare-earth ions (RE) ions on the structural and magnetic properties of high coercivity (Hc) SrFe10Al2O19 hexaferrite have been investigated using X-ray diffraction, transmission electron microscopy, differential scanning calorimeter, and SQUID. A 73% increase in intrinsic coercivity is observed for Al doped SrFe10Al2O19 as compared to that of pure SrFe12O19. The RE doping brings in further 50% increase in the coercivity to Sr0.9RE0.1FeAll2O19. Overall the Curie temperature of Sr0.9RE0.1Fe10Al2O19 reduced upon RE substitution, however, among rare-earth ions Pr doping showed highest Tc 620 K. Doping SrFe10Al2O19 with RE ions seems to be detrimental to the saturation magnetization but was observed to be favorable to the coercivity enhancement. 2012 Elsevier B.V. All rights reserved.
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