ペロブスカイト型Ａ　Ｆｅ１－ｘＣｏｘＯ３（Ａ＝Ｓｒ，Ｃａ）の強磁性

• 川崎 修嗣

  京都大学化学研究所

• 高野 幹夫

  京都大学化学研究所

• 武田 保雄

  三重大学工学部

書誌事項

タイトル別名

• Ferromagnetic Properties of A Fe1-xCoxO3(A=Sr,Ca).
• ペロブスカイトガタ AFe1-xCoxO3 A Sr Ca ノ キョウジセイ

抄録

AFe_1-xCo_xO_3-δ (A=Sr, Ca) with minimized oxygen deficiency was prepared using high pressure technique. An oxider KCIO₄ was encapsulated with the sample powder. The Co-substitution makes Fe_3d electrons of AFeO₃ more delocalized and induces metallic conduction and ferromagnetism. Cubic SrFe_1-xCo_xO₃ shows ferromagnetism above 300 K for 0.4≤x≤0.9. From the composition dependence of unit cell volume, a possibility of negative magnetovolume effect has been raised. In orthorhombic CaFe_1-xCo_xO₃ (0≤x≤0.5) Fe_3d electrons seem to be more localized as judged from the magnetic hyperfine field measured by Mossbauer spectroscopy, and T_c is lower and the magnetization is smaller in comparison with the Sr-analogue. These seem to indicate that the σ^* band is narrow in the Ca-phase because the Fe-O-Fe band is bent to -150.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 43 (8), 1001-1006, 1996

  一般社団法人 粉体粉末冶金協会

キーワード

• AFe<SUB>1-x</SUB>Co<SUB>x</SUB>O<SUB>3- ?? </SUB>(A=Sr, Ca)
• perovskite type oxide
• ferromagnetic metal
• high pressure synthesis
• Mössbauer spectroscopy

詳細情報

• CRID: 1390282681284412032
• NII論文ID: 10002012828
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.43.1001
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 4012524
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4012524
• 本文言語コード: ja
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可