Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction

Hajime Hojo, Koji Fujita, Katsuhisa Tanaka, Kazuyuki Hirao

研究成果: 著書/レポートタイプへの貢献会議での発言

1 引用 (Scopus)

抄録

Polycrystalline β-Ga2O3 doped with Fe 3+, (Ga1-xFex)203 (x=0.02, 0.05, 0.08 and 0.1), has been prepared by a solid-state reaction. Ferromagnetic ordering is observed at room temperature for samples prepared by β-Ga2O3 and Fe(NO3)3̇9H2O and sintered at low temperatures below 900°C, while the sintering at temperatures above 900°C leads to the paramagnetic behavior. X-ray diffraction analysis for the samples sintered at 500°C reveals that the single phase of β-Ga 2O3 can be obtained up to x=0.08 without traces of secondary phase or other impurity. Magnetization as a function of temperature shows superparamagnetic or cluster spin-glass behavior, indicating that long-range ferromagnetic ordering does not exist in the present systems. It is suggested that the inhomogeneous distribution of Fe3+ is responsible for the ferromagnetic behavior.

元の言語英語
ホスト出版物のタイトルFabrication and New Applications of Nanomagnetic Structures
ページ21-26
ページ数6
853
出版物ステータス出版済み - 2004
外部発表Yes
イベント2004 MRS Fall Meeting - Boston, MA, 米国
継続期間: 11 29 200412 3 2004

その他

その他2004 MRS Fall Meeting
米国
Boston, MA
期間11/29/0412/3/04

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Ferromagnetism
Solid state reactions
Temperature
Spin glass
X ray diffraction analysis
Magnetization
Sintering
Impurities

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

これを引用

Hojo, H., Fujita, K., Tanaka, K., & Hirao, K. (2004). Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. : Fabrication and New Applications of Nanomagnetic Structures (巻 853, pp. 21-26)

Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. / Hojo, Hajime; Fujita, Koji; Tanaka, Katsuhisa; Hirao, Kazuyuki.

Fabrication and New Applications of Nanomagnetic Structures. 巻 853 2004. p. 21-26.

研究成果: 著書/レポートタイプへの貢献会議での発言

Hojo, H, Fujita, K, Tanaka, K & Hirao, K 2004, Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. : Fabrication and New Applications of Nanomagnetic Structures. 巻. 853, pp. 21-26, 2004 MRS Fall Meeting, Boston, MA, 米国, 11/29/04.
Hojo H, Fujita K, Tanaka K, Hirao K. Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. : Fabrication and New Applications of Nanomagnetic Structures. 巻 853. 2004. p. 21-26
Hojo, Hajime ; Fujita, Koji ; Tanaka, Katsuhisa ; Hirao, Kazuyuki. / Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. Fabrication and New Applications of Nanomagnetic Structures. 巻 853 2004. pp. 21-26
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N2 - Polycrystalline β-Ga2O3 doped with Fe 3+, (Ga1-xFex)203 (x=0.02, 0.05, 0.08 and 0.1), has been prepared by a solid-state reaction. Ferromagnetic ordering is observed at room temperature for samples prepared by β-Ga2O3 and Fe(NO3)3̇9H2O and sintered at low temperatures below 900°C, while the sintering at temperatures above 900°C leads to the paramagnetic behavior. X-ray diffraction analysis for the samples sintered at 500°C reveals that the single phase of β-Ga 2O3 can be obtained up to x=0.08 without traces of secondary phase or other impurity. Magnetization as a function of temperature shows superparamagnetic or cluster spin-glass behavior, indicating that long-range ferromagnetic ordering does not exist in the present systems. It is suggested that the inhomogeneous distribution of Fe3+ is responsible for the ferromagnetic behavior.

AB - Polycrystalline β-Ga2O3 doped with Fe 3+, (Ga1-xFex)203 (x=0.02, 0.05, 0.08 and 0.1), has been prepared by a solid-state reaction. Ferromagnetic ordering is observed at room temperature for samples prepared by β-Ga2O3 and Fe(NO3)3̇9H2O and sintered at low temperatures below 900°C, while the sintering at temperatures above 900°C leads to the paramagnetic behavior. X-ray diffraction analysis for the samples sintered at 500°C reveals that the single phase of β-Ga 2O3 can be obtained up to x=0.08 without traces of secondary phase or other impurity. Magnetization as a function of temperature shows superparamagnetic or cluster spin-glass behavior, indicating that long-range ferromagnetic ordering does not exist in the present systems. It is suggested that the inhomogeneous distribution of Fe3+ is responsible for the ferromagnetic behavior.

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