Moessbauer evaluation of cation distribution in titanomagnetites

Peak area analyses of Moessbauer spectra were used to directly appraise models of cation distribution in synthetic titanomagnetites, Ti sub(x)Fe sub(3-x)O sub(4)(0 < x < 1). For x < 0.30, room-temperature and zero-field data were sufficient for this purpose. At higher Ti concentrations, how...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1999-01, Vol.191 (1-2), p.72-78
Main Authors: Hamdeh, H H, Barghout, K, Ho, J C, Shand, P M, Miller, L L
Format: Article
Language:English
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Summary:Peak area analyses of Moessbauer spectra were used to directly appraise models of cation distribution in synthetic titanomagnetites, Ti sub(x)Fe sub(3-x)O sub(4)(0 < x < 1). For x < 0.30, room-temperature and zero-field data were sufficient for this purpose. At higher Ti concentrations, however, they were inconclusive or ineffective because the Moessbauer signals from Fe ions on both tetrahedral and octahedral sites were inextricable. Instead, Moessbauer spectra were collected at 4.2 K in a 7 T magnetic field. In these spectra, the signal from Fe super(3+) ions on the tetrahedral sites of the cubic spinels was effectively delineated, and on the basis of its area fraction a new cation distribution is proposed.
ISSN:0304-8853