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Bi3Mn3O11:新しいKSbO3タイプのランダムフェリマグネットで,T (C) が高い
Alexei A Belik1, Eiji Takayama-Muromachi
1International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. Alexei.Belik@nims.go.jp
Journal of the American Chemical Society
|July 9, 2009
まとめ
新しいビスムート・マンガン酸化物,Bi ((3) Mn ((3) O ((11)) が合成され,フェリマグネットであることが判明しました. この化合物は興味深い磁気特性と構造的適応性を表しており,KSbO ((3) 型材料の研究を活性化する可能性が高い.
科学分野:
- 固体化学 固体化学
- マテリアルサイエンス 材料科学
- マグネティズム (磁気) とは
背景:
- KSbO(3) 化合物ファミリーは,構造的適応性で知られています.
- 独特の磁気特性を有する新しい材料の探求は,技術的進歩にとって極めて重要です.
研究 の 目的:
- KSbO(3) 型構造を持つ新しい化合物,Bi(3) Mn(3) O(11) を合成し,特徴づけること.
- 合成された化合物の構造,化学,磁気特性を調査する.
- Bi ((3) Mn ((3) O ((11)) の熱安定性と相変化を理解する.
主な方法:
- 高圧合成技術. 高圧合成技術.
- 構造的特徴 (例えば,X線 difraksion) について.
- 磁気特性測定 (例えば,SQUID磁気計) について.
- 熱分析 (例えば,熱重力測定分析).
主要な成果:
- KSbO(3) 型構造を持つBi(3) Mn(3) O(11) の合成が成功しました.
- Bi ((3) Mn ((3) O ((11) は,高キュリー温度 (T ((C)) とともに,フェリ磁気的行動を示す.
- 化合物は熱的不安定性を示し,加熱すると徐々に酸素を失い,磁気特性が変化した新しい相を形成します.
結論:
- Bi ((3) Mn ((3) O ((11) の発見は,KSbO ((3) 構造家族内の既知の材料を拡張する.
- ランダムなカチオン分布にもかかわらず,Bi(3) Mn(3) O(11) で観察されたフェリ磁気性は注目に値する.
- 熱的酸素の損失とその結果生じる磁気特性の変化は,化合物の適応性の性質とさらなる調査の可能性を強調しています.
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