Synthesis and cation distribution of copper-substituted spinel-related lithium ferrite

H. M. Widatallah, C. Johnson, F. J. Berry, A. M. Gismelseed, E. Jartych, J. F. Marco, F. S. Gard, M. Pekala

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Single-phased Cu2+-substituted spinel-related Li0.5Fe2.5O4 was synthesized by sintering a mixture of Cu2+-substituted corundum-related α-Fe2O3 and Li2CO3 at 700 °C which is ∼325-400 °C lower than the temperature at which the material is prepared by the conventional ceramic methods. X-ray powder diffraction, X-ray photoelectron spectroscopy, Mössbauer spectroscopy and magnetic measurements were used to characterize the material. In contrast to high-temperature synthetic routes, the present one leads to a Cu+-and Fe2+-cation free material, thereby optimizing its technological value. Rietveld refinement of the XRD data favors a structural model in which Cu2+ substitutes for both Fe3+ and Li+ at the octahedral sites. Mössbauer and magnetic data are consistent with this model if spin thermal reversal and/or spin canting are taken into account for the later.

Original languageEnglish
Pages (from-to)1817-1822
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume67
Issue number8
DOIs
Publication statusPublished - Aug 2006

Keywords

  • C. Mössbauer spectroscopy
  • C. X-ray diffraction (XRD)
  • C. X-ray photoelectron spectroscopy (XPS)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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