新しい1次元マンガネートCs3Mn2O4の合成,結晶構造,磁気特性
Jürgen Nuss1, Maria A Señaris-Rodriguez, Prasad L V K Dasari
1Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
Journal of the American Chemical Society
|June 27, 2012
まとめ
新しい三次元マンガンの化合物,Cs(3) Mn(2) O(4) は,Mn(2+) とMn(3+) イオンのユニークな1D電荷配列を示しています. この材料は,結合された反鉄磁鎖によって駆動される12K未満の複雑な磁気配列現象を示しています.
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
- マグネチズム (磁気) とは
背景:
- 混合バレンスの三次マングネス化合物は希少である.
- 移行金属酸化物における電荷の順序を理解することは,新しい電子特性にとって極めて重要です.
研究 の 目的:
- 新しい三元マングネス (II/III) の混合価化合物を合成し,特徴づけます.
- Cs(3)Mn(2)O(4) の結晶構造,電荷の配列,磁気特性を研究する.
主な方法:
- アジド/ニートレートの合成経路.
- 粉末と単結晶のX線 difrakcion. 粉末と単結晶のX線 difrakcion. 粉末と単結晶のX線 difrakcion. 粉末と単結晶のX線 difrakcion. 粉末と単結晶のX線 difrakcion. 粉末と単結晶のX線 difrakcion. 粉末と単結晶のX線 difrakcion.
- 磁気感受性の測定. 磁気感受性の測定. 磁気感受性の測定. 磁気感受性の測定.
- 密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.
主要な成果:
- Cs(3) Mn(2) O(4) を合成し,その結晶構造を決定した (P2(1) /c).
- 構造は,1D MnO (((2) ((1.5-) 鎖を特徴とし,Mn (((2+) とMn (((3+) の完全 1:1 充電順に配置されています.
- 鎖内の反鉄磁気結合は, ~12 K 以下の 3D 順序を持つ鉄磁気鎖につながり,フィールドに依存する現象を示します.
結論:
- Cs(3)Mn(2)O(4) は,完全な電荷順序を示す最初の内在的にドーピングされたA(x) MnO(2) です.
- この化合物は,連鎖間の結合の変化から生じる複雑な磁気行動を表している.
- DFTの計算は,基底状態として反鉄磁性順序付けをサポートします.
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