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Far-infrared spectra of lithium-titanium mixed ferrites

Authors
Journal
Materials Science and Engineering B
0921-5107
Publisher
Elsevier
Publication Date
Volume
22
Identifiers
DOI: 10.1016/0921-5107(94)90244-5
Disciplines
  • Physics

Abstract

Abstract The far-infrared spectra of Li 0.5+0.5 a Fe 2.5−1.5 a Ti a O 4 reveal two prominent bands v 1 and v 2 and two weak bands v 3 and v 4 in the 700−200 cm −1 range. The high frequency bands v 1 and v 2 are assigned to tetrahedral metal complexes. On the basis of the analysis of the IR bands and their correlation with the cation distribution, the band v 3 is assigned to octahedral divalent metal ion-oxygen complexes, while the lowest frequency band v 4 is attributed to the lattice vibrations in the mixed ferrites. The splitting of the IR spectral band is explained on the basis of Fe 2+ ion concentration.

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