CeFeSb3的合成,结构,磁性和运输特性
Manuel Schulze1, Bastian Rubrecht2, Felix Seewald3
1Faculty of Chemistry and Food Chemistry, TUD Dresden University of Technology, 01062 Dresden, Germany. thomas.doert@tu-dresden.de.
Dalton transactions (Cambridge, England : 2003)
|July 17, 2025
概括
这项研究合成了CeFeSb3晶体,揭示了由局部Ce 4f瞬间和Kondo类相互作用驱动的复杂的反铁磁排序.
科学领域:
- 固态化学 固态化学
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- CePdSb3结构类型为探索新的磁性和电子性质提供了一个框架.
- 了解晶体结构,电子相互作用和磁性排序之间的相互作用对于材料设计至关重要.
研究的目的:
- 为了合成和描述CeFeSb3.3的晶体结构.
- 为了研究CeFeSb3.3的磁性和电子性质.
- 阐明Fe-Fe结合和材料内的磁相互作用的性质.
主要方法:
- 使用比斯 (Bi) 流体的流体合成.
- 用于结构确定的X射线晶体学.
- 磁化测量以探测磁性排序.
- 量子化学计算以确认结合.
- 梅斯巴乌尔光谱法用于评估铁原子的行为.
- 电力传输测量用于分析电子属性.
主要成果:
- CeFeSb3结晶成CePdSb3结构类型,具有交替的Sb八面体对的板块和由Ce层分离的Sb方层.
- 短的Fe-Fe距离 (2.682 Å) 表明共价键,由量子化学计算证实.
- 在4.7K观察到复杂的反铁磁排序,归因于由RKKY相互作用介导的局部Ce 4f时刻.
- 梅斯巴乌尔光谱显示非磁性铁原子.
- 电运输数据证实CeFeSb3是一种表现出Kondo类相互作用的金属,与磁顺序相竞争.
结论:
- CeFeSb3具有独特的晶体结构,具有共价Fe-Fe键.
- 该材料显示了由局部Ce 4f瞬间和RKKY相互作用影响的复杂的反铁磁顺序.
- 康多式相互作用和磁性排序之间的竞争标志着CeFeSb3.3的金属行为.
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