Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 550, Issue -, Pages 198-203Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.09.021
Keywords
Sr-Ferrite; Autocombustion; Doped ferrite
Categories
Funding
- U.S. National Science Foundation [1029780, 0965801]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0965801] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1029780] Funding Source: National Science Foundation
- Office Of The Director
- EPSCoR [1004083] Funding Source: National Science Foundation
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Influence of replacing Sr2+ ions by rare-earth ions (RE3+) ions on the structural and magnetic properties of high coercivity (H-c) 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 Al3+ doped SrFe10Al2O19 as compared to that of pure SrFe12O19. The RE3+ doping brings in further 50% increase in the coercivity to Sr0.9RE0.1Fe10Al2O19. Overall the Curie temperature of Sr0.9RE0.1Fe10Al2O19 reduced upon RE3+ substitution, however, among rare-earth ions Pr3+ doping showed highest T-c similar to 620 K. Doping SrFe10Al2O19 with RE3+ ions seems to be detrimental to the saturation magnetization but was observed to be favorable to the coercivity enhancement. (C) 2012 Elsevier B.V. All rights reserved.
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