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

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    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

    Fingerprint

    Ions
    valence
    room temperature
    ions
    Temperature
    Ferromagnetism
    X ray absorption
    Magnetic susceptibility
    ferromagnetism
    fine structure
    Doping (additives)
    magnetic permeability
    x rays

    Keywords

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

    ASJC Scopus subject areas

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

    Cite this

    Valence state analysis of Mn and Fe ions in room-temperature ferromagnetic Mn- and Fe-codoped in 2 O 3 . / Okazaki, Teruki; Yoshioka, Tsuyoshi; Kusakabe, Yasuyuki; Yamamoto, Tomoyuki; Kitada, Akihiko.

    In: Solid State Communications, Vol. 151, No. 23, 12.2011, p. 1749-1752.

    Research output: Contribution to journalArticle

    Okazaki, Teruki ; Yoshioka, Tsuyoshi ; Kusakabe, Yasuyuki ; Yamamoto, Tomoyuki ; Kitada, Akihiko. / Valence state analysis of Mn and Fe ions in room-temperature ferromagnetic Mn- and Fe-codoped in 2 O 3 In: Solid State Communications. 2011 ; Vol. 151, No. 23. pp. 1749-1752.
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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.",
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    AU - Okazaki, Teruki

    AU - Yoshioka, Tsuyoshi

    AU - Kusakabe, Yasuyuki

    AU - Yamamoto, Tomoyuki

    AU - Kitada, Akihiko

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    N2 - 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.

    AB - 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.

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