Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 561, Issue -, Pages 121-128Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.01.081
Keywords
Ferrites; BaxSr1-xFe12O19; Magnetic properties; Mossbauer spectroscopy; Sol-gel synthesis; Solid state reaction method
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Funding
- COST [MP0904]
- STSM Action
- Romanian national project [IDCPLX-0006]
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Hexagonal ferrites BaxSr1-xFe12O19 (x = 0.05, 0.15, 0.25, 0.35) were prepared by sol-gel and conventional solid state reaction techniques. Their magnetic properties, investigated by magnetometry and Mossbauer spectroscopy, were discussed in correlation to structural aspects. Whereas the hexaferrites obtained by sol-gel are almost single phase, the ones prepared by the conventional solid state reaction technique present a low amount of BaFe2O4 as secondary phase. All samples show a relative high coercive field and remanent magnetization, as specific features for permanent magnet behavior. The five Fe3+ sites of the specific elemental cell have been revealed and their relative occupancy has been derived from the Mossbauer spectra. The analyzed samples show a sensitivity of the magnetic properties (magnetic moment and anisotropy) with respect to the occupancy of the different Fe sites. (C) 2013 Elsevier B. V. All rights reserved.
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