関連する実験動画
Updated: Jun 1, 2026
08:43
Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
ペロブスキート,LiNbO3,コロンド,および (In(1-x) M(x)) MO3 の六角形ポリモルフ
Alexei A Belik1, Takao Furubayashi, Hitoshi Yusa
1International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. alexei.belik@nims.go.jp
Journal of the American Chemical Society
|May 25, 2011
まとめ
この研究では, (In(1-x) M(x)) MO(3) の3つの相を合成し,特徴づけ,異なる結晶構造とLiNbO(3),コロンド,および六角形相の磁気順序温度を明らかにしました. 材料は圧力の下で逆転する変容を経験し,カチオン順序と磁性特性に影響を及ぼします.
科学分野:
- 材料科学 材料科学とは
- 固体化学 固体化学
- クリスタログラフィーです.
背景:
- 調節可能な磁性および構造特性を有する新材料の研究は,高度なアプリケーションにとって極めて重要です.
- 複合酸化物における相変換とカチオン配列の理解は,材料設計に役立つ.
- マンガネスと鉄ドーピングされたインジウム酸化物は,マルチフェロ性および磁性現象の探索の機会を提供します.
研究 の 目的:
- (In(1-x) M(x)) MO(3) の異なる結晶相を合成し,特徴づけ,M = Fe(0.5) Mn(0.5) とした.
- 結晶構造とLiNbOの磁性特性を解明するために, LiNbO (((3),コーリンジウム,および六角形フェーズ.
- 異なる圧力および温度条件下でのカチオン順序と相変化の振る舞いを研究する.
主な方法:
- 高圧と高温合成. 高圧と高温合成. 高圧と高温合成. 高圧と高温合成.
- 結晶構造の決定のためのシンクロトロンX線粉末 difraktion.
- 特性評価のための微分熱分析,磁気測定,およびモッズバウアー光譜法.
主要な成果:
- LiNbO{3},コロンド,および (In{1-x) M{x)) MO{3}の六角形相を成功裏に製造しました.
- 各相の決定された結晶構造と格子パラメータで,それぞれ空間群R3c,R-3c,P6(3) /mmcを特定する.
- 各相 (270 K, 200 K, 140 K) に関する反鉄磁気順序温度 (T(N)) の変動を観察し,相変換中のカチオン乱れ/順序の移行を文書化しました.
- ~5GPaでペロブスキートGdFeO(3) 型構造への可逆変換が確認されました.
結論:
- 合成された (In(1-x) M(x)) MO(3) は,独特の磁性特性を有する構造的相が特徴的です.
- カチオン順序は,観測された相変換と磁気行動において重要な役割を果たします.
- 圧力下での可逆的な構造変化を経験する材料の能力は,反応性のある材料のアプリケーションのためのその可能性を強調します.
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