Valence state analysis of Mn and Fe ions in room-temperature ferromagnetic Mn- and Fe-codoped in 2 O 3

Teruki Okazaki, Tsuyoshi Yoshioka, Yasuyuki Kusakabe, Tomoyuki Yamamoto, Akihiko Kitada

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Abstract

The detailed valence states of Mn and Fe ions in room-temperature ferromagnetic In2O3 doped with Mn and Fe ions were investigated by the near-edge X-ray absorption fine structure (NEXAFS) measurements. It was confirmed that Mn2+ and Mn3+ coexist in In2O3. In addition to these two magnetic ions, Sn 4+ was incorporated to control the charge states of doped Mn and/or Fe ions, which makes the Mn2+Mn3+ ratio larger with an increase in the doped- Sn4+ concentration. It was found that the magnetic susceptibility decreased with an increase in Mn2+ because of the Sn4+-doping, which indicated that the coexistence of Mn 2+ and Mn3+ is mandatory for room-temperature ferromagnetism in Mn- and Fe-codoped In2O3.

Original languageEnglish
Pages (from-to)1749-1752
Number of pages4
JournalSolid State Communications
Volume151
Issue number23
DOIs
Publication statusPublished - 2011 Dec 1

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Keywords

  • Dilute magnetic oxide
  • Mn- and Fe-codoped InO
  • Near-edge X-ray absorption fine structure
  • Room-temperature ferromagnetism

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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