在其构成驱动的磁性性质变化中,对Gd-Au-Al 1/1准晶体近似相的结构分析
Yu-Chin Huang1, Ulrich Häussermann2, Girma H Gebresenbut1
1Department of Chemistry, Ångström Laboratory, Uppsala University, 751 21 Uppsala, Sweden.
Inorganic chemistry
|August 29, 2023
概括
仅仅是价值电子度 (e/a) 的比率不足以解释准晶体近似的磁性秩序. 非磁性元素的混合显著影响Gd14Au_xAl86-x系统中的磁性特性.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 磁力学 磁力学 是一种
背景情况:
- Gd14Au_xAl86-x Tsai型 1/1 准晶近似器 (AC) 显示可调节的磁顺序.
- 价值电子度 (e/a) 比率传统上被认为是准晶体 (QC) 和交流晶体磁性秩序的关键.
- 非线性格子参数趋势表明这些AC的非传统行为.
研究的目的:
- 为了研究Au度对Gd14Au_xAl86-x ACs的结构和磁性特性的影响.
- 为了确定e/a比是否足够解释观察到的磁性行为.
- 探索非磁性元素混合在磁性属性调节中的作用.
主要方法:
- 单晶X射线衍射用于分析具有不同Au度的样品 (x = 52, 53, 56, 61, 66, 73).
- 结构分析的重点是Au和Al的排序及其对加多 (Gd) 原子外的影响.
- 研究了原子间Gd-Gd距离与磁性质之间的相关性.
主要成果:
- 随着Au度 (x) 的上升,Au/Al排序的增加会导致Gd双面的扭曲.
- 观测到的Gd-Gd原子间距离趋势与不同x值的磁性特性变化相关.
- 单独的e/a比率并不能完全解释磁性顺序,这凸显了Au/Al混合的重要性.
结论:
- e/a比率是一个过于简单的度量,用于理解1/1的长距离磁顺序在AC和QC中.
- 非磁性元素 (Au和Al) 的混合行为显著影响Gd14Au_xAl86-x系统的磁性.
- 这些发现为定制先进材料的磁性提供了洞察力.
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