Mössbauer study of iron ordering in mixed valence system LuFe 2O4

Bong Kyu Bang, Sung Baek Kim, S. W. Cheong, Chul Sung Kim

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Single crystalline LuFe2O4 was grown by the floating zone method. The crystallographic and magnetic properties of the sample were measured using x-ray diffractometer (XRD), Mössbauer spectroscopy, and vibrating sample magnetometer (VSM). The crystal structure was found to be a two-dimensional layeredtype rhombohedral with space group R3-mh. The magnetic Curie temperature (TC) was determined to be 250 K from the M-T curve and Mössbauer spectra. Just below TC, the magnetic moment has large value and shows a abrupt change in M-T curve. The Mössbauer spectra have been taken at various temperatures ranging from 4.2 to 370 K. We confirmed that the charge ordering of Fe3+ and Fe2+ ions was begun below 350 K, magnetic superstructure of the different ionic state was formed around 320 K. The isomer shift value of Fe2+ doublet increases with decreasing temperature from 320 to 235 K. At low temperature, Mössbauer spectra consisted of four sextets with magnetic ordering.

Original languageEnglish (US)
Pages (from-to)4566-4569
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Issue number12
StatePublished - Dec 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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