固体溶液Zr的系统研究V1-xAlx) 2 采用的阶段结构
Elias C J Gießelmann1, Lars Schumacher2, Samir F Matar3
1Inorganic Solid State Chemistry, Saarland University, Campus C4.1, 66123, Saarbrücken, Germany.
Chemistry (Weinheim an der Bergstrasse, Germany)
|December 13, 2024
概括
研究人员研究了Zr-V-Al Laves阶段,没有发现任何超结构. 他们观察到基于含量的明显的六角形和立体结构,其中一个样本表现出超导性.
科学领域:
- 固态化学和材料科学 固态化学和材料科学
- 研究金属间化合物及其结构性质.
背景情况:
- 在结构化学和物理性质研究中,Laves阶段至关重要.
- 之前对Hf-V-Al系统的研究显示了超结构的形成,促使与Zr-V-Al进行比较.
研究的目的:
- 探索三元拉维斯相系统Zr-V-Al的结构和物理特性.
- 为了确定Zr(V1-xAlx) 2固体溶液中存在或不存在的超结构.
- 为了描述合成的Zr-V-Al化合物的磁性和超导性.
主要方法:
- 合成和Zr-V-Al合金的表征.
- 粉末X射线衍射 (PXRD) 用于结构分析.
- 单晶X射线衍射证实了上层结构的缺失.
- 27 阿尔魔术旋转角度核磁共振 (MAS NMR) 光谱.
- 量子化学计算用于光谱分析.
- 测量磁性特性,包括确定临界温度 (TC).
主要成果:
- 固体溶液Zr(V1-xAlx)2没有表现出超结构,与Hf-V-Al系统不同.
- 富含的相采用六角MgZn型结构,而富含的相采用立方MgCu型.
- 27 阿尔马斯核磁共振检测证实没有超结构.
- 在研究的化合物中观察到保利-重磁性.
- 在Zr(V0.875Al0.125) 2中检测到超导,TC为4.17(1) K.
- 六角拉维斯相 (MgZn2类型) 被发现是主导的,即使在理想的拉维斯相状态之外的组成.
结论:
- Zr-V-Al系统形成了一个固体溶液,具有明显的六角形和立方形Laves阶段,没有超层结构.
- 在Zr(V0.875Al0.125) 2中观察到的超导性突出显示了这个系统中新型超导材料的潜力.
- 六角形Laves阶段的流行表明它在Zr-V-Al系统中的各种组成中具有结构稳定性.
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