Mössbauer spectra in external field of highly substituted aluminous hematites

Six synthetic α-Fe 2O 3 powder samples with Al substituted for Fe in the range 9.5–28.1 mol% have been studied by Mössbauer spectroscopy at 4 K in an external field of 60 kOe applied parallel to the γ-ray beam. These samples are all in the weakly ferromagnetic state and the magnetic moment has a str...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1995, Vol.139 (1), p.6-10
Main Authors: Bowen, L.H., De Grave, E.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Mossbauer effect
other γ-ray spectroscopy
Mössbauer effect
other γ-ray spectroscopy
Physics
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Summary:Six synthetic α-Fe 2O 3 powder samples with Al substituted for Fe in the range 9.5–28.1 mol% have been studied by Mössbauer spectroscopy at 4 K in an external field of 60 kOe applied parallel to the γ-ray beam. These samples are all in the weakly ferromagnetic state and the magnetic moment has a strong tendency to align with the external field, causing the spins to align almost perpendicular. There are small but significant correlations of canting angle and width of the observed hyperfine field distribution with AI content. However, the alignment is neither complete nor uniform in any of these samples.
ISSN:0304-8853
DOI:10.1016/0304-8853(95)90022-5