Raman spectra and vibrational analysis of BaFe{sub 12}O{sub 19} hexagonal ferrite

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1997.7737· OSTI ID:642156

Kreisel, J; Lucazeau, G; Vincent, H ^[1]

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1. ENSPG-INPG, St. Martin d`Heres (France)

This paper reports on the first Raman spectra of barium hexaferrite, BaFe{sub 12}O{sub 19}, as a member of the magnetoplumbite-type structure. The spectra, recorded from 150 to 1,000 cm{sup {minus}1} at room and liquid nitrogen temperature, are analyzed on the basis of D{sub 6h} factor group selection rules. The iron atom on the bi-pyramidal site is discussed with regard to its particular dynamics. The distribution of normal modes in BaFe{sub 12}O{sub 19} is examined on the basis of the Raman spectra of {beta}-alumina and a series of ferrites. Emphasis has been put on the factors influencing the Raman frequencies, namely the value of the coordination number, the degree of connection of a coordinated group, and the mass effect.

• OSTI ID: 642156
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 137; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CHEMICAL COMPOSITION
CORRELATIONS
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
IRON OXIDES
MONOCRYSTALS
RAMAN SPECTRA
TEMPERATURE DEPENDENCE