金属と金属の結合による混合バレンスのディランタニド複合体からの超硬質磁気
Colin A Gould1, K Randall McClain2, Daniel Reta3
1Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.
Science (New York, N.Y.)
|January 13, 2022
まとめ
ランタニド協調化合物は強い磁気性を持っています. テルビウムとディスプロシウム化合物に金属結合を導入することで,強力な分子磁石を生成し,強制力を大幅に高めました.
科学分野:
- 材料科学
- 無機化学
- マグネティズム
背景:
- ランタニド協調化合物は磁気性で知られている.
- これらの材料は,液体窒素に近い温度で永続的な磁性を示します.
- 既存の分子磁石は,より高い温度での性能に制限があります.
研究 の 目的:
- ランタニド化合物の磁気強制力に対する金属結合の影響を調査する.
- 分子磁石の性能を高めるための新しい戦略を探求する.
- 新しいテルビウムとディスプロシウム協調化合物を合成し,特徴づけること.
主な方法:
- ヨウ素ブリッジテリビウムとディプロシウムジメルの合成
- 金属と金属の単一の電子結合を形成するジメルの還元.
- 低温での磁気強制力の測定
主要な成果:
- テリビウムとディスプロシウムの二重体における金属の中心間の単一の電子結合を達成した.
- 改造された化合物では 強制性が著しく増加した.
- 強制フィールドは50K (テルビウム) と60K (ディスプロシウム) 以下の14テスラを超えました.
結論:
- 金属結合は,ランタニド協調化合物の強制性を高めるための効果的な戦略です.
- 合成された化合物は 高圧性を持つ高度な分子磁石を表しています
- これらの発見は,アクセス可能な温度で動作する高性能磁気材料の開発に道を開きます.
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