マグネトカロリー効果に基づくGd独占クラスターGdの性能改善を調査する60
Xi-Ming Luo1, Zhao-Bo Hu2, Qing-Fang Lin1
1College of Chemical Engineering , State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University , Nanjing 210009 , P. R. China.
Journal of the American Chemical Society
|August 24, 2018
まとめ
研究者は,大きなガドリニウムクラスターを合成する新しい方法を開発し,このような高核性ランタニドクラスターでこれまでに記録された最高磁気エントロピーの変化を達成し,磁気カロリー効果の応用を進めました.
科学分野:
- 材料科学
- 化学について
- 物理学
背景:
- ガドリニウム (Gd) クラスターは,Gd (III) のf7電子構成により,磁熱効果 (MCE) の有望性を示しています.
- GdクラスタでのMCEの強化は,構造的なコントロールの困難のために困難です.
研究 の 目的:
- 高核性ランタニドクラスタの新合成戦略を開発する.
- ガドリニウムクラスターの磁熱性能を向上させるため
主な方法:
- 制御されたリガンドの放出のためのアセトニトリルの在位水解.
- 溶熱合成条件
- 大型のランタニド群複合体 (1-Gd60) の分離と特徴づけ.
主要な成果:
- 新しい,大きなランタナイド専用クラスター,1-Gd60が合成されました.
- クラスターは金属とリガンドの比率が高く,高磁気密度を示しています.
- 最大の磁気エントロピーの変化 (-ΔSmmax = 48.0 J kg-1 K-1 2 K で ΔH = 7 T) は,報告された高核性ランタナイド群の中で達成されました.
結論:
- 新しい合成アプローチにより,MCEの特性を強化した複雑なランタニド構造を作成できます.
- 合成された1-Gd60クラスターは,磁熱物質の分野における重要な進歩を表しています.
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