Journal
PHYSICA B-CONDENSED MATTER
Volume 327, Issue 2-4, Pages 135-139Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4526(02)01712-X
Keywords
SrFe12O19; hexaferrites; La-Co substitution; Mossbauer spectrometry
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Sr1-xLaxFe12-yCOyO19 powders with y/x = 0.75 and x = 0.1, 0.2, 0.3, 0.4 were prepared according to a ceramic process. X-ray diffraction analysis shows that all the powders are of single, hexagonal M-type, phase. The Mossbauer investigation confirms that CO2+ substitutes for Fe3+ in both 4f(2), (mainly) and 2a sites. The most important hyperfine parameters changes concern the 12k, 42 and 2b sites and are related to both CO2+/Fe3+ and La3+/Sr2+ substitution effects. (C) 2002 Elsevier Science B.V. All rights reserved.
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