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

doi:10.1016/j.ssc.2011.08.035

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

^*Corresponding author for this work

School of Fundamental Science and Engineering

Research output: Contribution to journal › Article › peer-review

5 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 language	English
Pages (from-to)	1749-1752
Number of pages	4
Journal	Solid State Communications
Volume	151
Issue number	23
DOIs	https://doi.org/10.1016/j.ssc.2011.08.035
Publication status	Published - 2011 Dec 1

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

Access to Document

10.1016/j.ssc.2011.08.035

Cite this

@article{3437a79301ef47b7a365f13084d5a19d,

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

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.",

keywords = "Dilute magnetic oxide, Mn- and Fe-codoped InO, Near-edge X-ray absorption fine structure, Room-temperature ferromagnetism",

author = "Teruki Okazaki and Tsuyoshi Yoshioka and Yasuyuki Kusakabe and Tomoyuki Yamamoto and Akihiko Kitada",

year = "2011",

month = dec,

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T1 - Valence state analysis of Mn and Fe ions in room-temperature ferromagnetic Mn- and Fe-codoped in 2 O 3

AU - Okazaki, Teruki

AU - Yoshioka, Tsuyoshi

AU - Kusakabe, Yasuyuki

AU - Yamamoto, Tomoyuki

AU - Kitada, Akihiko

PY - 2011/12/1

Y1 - 2011/12/1

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.

KW - Dilute magnetic oxide

KW - Mn- and Fe-codoped InO

KW - Near-edge X-ray absorption fine structure

KW - Room-temperature ferromagnetism

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