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

Hajime Hojo, Koji Fujita, Katsuhisa Tanaka, Kazuyuki Hirao

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

2 被引用数 (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.

本文言語英語
ホスト出版物のタイトルFabrication and New Applications of Nanomagnetic Structures
出版社Materials Research Society
ページ21-26
ページ数6
ISBN(印刷版)1558998055, 9781558998056
DOI
出版ステータス出版済み - 2004
外部発表はい
イベント2004 MRS Fall Meeting - Boston, MA, 米国
継続期間: 11月 29 200412月 3 2004

出版物シリーズ

名前Materials Research Society Symposium Proceedings
853
ISSN(印刷版)0272-9172

その他

その他2004 MRS Fall Meeting
国/地域米国
CityBoston, MA
Period11/29/0412/3/04

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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