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

Bong Kyu Bang, Sung Baek Kim, Sang-Wook Cheong, Chul Sung Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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
Volume244
Issue number12
DOIs
StatePublished - Dec 1 2007

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Iron
valence
iron
Diffractometers
Magnetometers
curves
Curie temperature
Magnetic moments
diffractometers
Isomers
Temperature
magnetometers
floating
Magnetization
Magnetic properties
isomers
magnetic moments
Crystal structure
Spectroscopy
Ions

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Bang, Bong Kyu ; Kim, Sung Baek ; Cheong, Sang-Wook ; Kim, Chul Sung. / Mössbauer study of iron ordering in mixed valence system LuFe 2O4. In: Physica Status Solidi (B) Basic Research. 2007 ; Vol. 244, No. 12. pp. 4566-4569.
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abstract = "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), M{\"o}ssbauer 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 M{\"o}ssbauer spectra. Just below TC, the magnetic moment has large value and shows a abrupt change in M-T curve. The M{\"o}ssbauer 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, M{\"o}ssbauer spectra consisted of four sextets with magnetic ordering.",
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Mössbauer study of iron ordering in mixed valence system LuFe 2O4. / Bang, Bong Kyu; Kim, Sung Baek; Cheong, Sang-Wook; Kim, Chul Sung.

In: Physica Status Solidi (B) Basic Research, Vol. 244, No. 12, 01.12.2007, p. 4566-4569.

Research output: Contribution to journalArticle

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