Sol-gel synthesis and dilute magnetism of nano MgO powder doped with Fe

Kiyoshi Nomura*, Souichirou Taya, Atsushi Okazawa, Norimichi Kojima

*この研究の対応する著者

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Mg oxides doped with 1 % 57Fe were prepared by a sol-gel method, and annealed at various temperatures. Nano-size Mg oxides were characterized by Mössbauer spectrometry, magnetization and XRD measurements. The crystalline size of MgO increases with increase of annealing temperature. Samples annealed at 600 °C and 800 °C gave only doublet peaks of paramagnetic Fe3+ in Mössbauer spectra although Fe3+ doping into MgO induced a distorted structure and showed weak ferromagnetism. It is considered that the magnetic property is due to defect induced magnetism by doping Fe3+ into MgO. For a sample heated at 1000 °C, it is found from low temperature Mössbauer spectra that Fe3+ species are located at the core and shell of fine MgFe2O4 grains and diluted in MgO matrix.

本文言語English
ページ(範囲)161-169
ページ数9
ジャーナルHyperfine Interactions
226
1-3
DOI
出版ステータスPublished - 2014 4月
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 核物理学および高エネルギー物理学
  • 凝縮系物理学
  • 物理化学および理論化学

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