Magnetic properties of BaxSr1axFe12O19 (x = 0.05a0.35) ferrites prepared by different methods

Hexagonal ferrites BaxSr1axFe12O19 (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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2013-06, Vol.561, p.121-128
Main Authors: Cernea, Marin, Sandu, Simona-Gabriela, Galassi, Carmen, Radu, Roxana, Kuncser, Victor
Format: Article
Language:English
Subjects:
Alloys
Ferrites
Magnetic properties
Magnetization
Mossbauer spectroscopy
Sol gel process
Solid state
Spectra
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hexagonal ferrites BaxSr1axFe12O19 (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.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2013.01.081