对Co2Fe0.5Cr0.5Al中诱导格子干扰的缺陷和磁相互作用的新见解
Ravi Kumar Yadav1,2, R Govindaraj1,2, K Vinod1,2
1Materials Science Group, Indira Gandhi Centre for Atomic Research Kalpakkam 603102 Tamilnadu India govind@igcar.gov.in.
RSC advances
|June 26, 2023
概括
这项研究揭示了缺陷如何影响Co2Fe0.5Cr0.5Al中的磁相互作用,使用Mössbauer光谱学. 它发现了网格障碍和磁场之间的联系,这表明了自旋电子应用的最佳化.
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:
- 了解缺陷诱导的磁相互作用对于自旋电子材料至关重要.
- 基于Co2FeAl的Heusler化合物对自旋电子应用具有前景.
研究的目的:
- 为了研究原子级缺陷诱导的磁相互作用在Co2Fe0.5Cr0.5Al.
- 将这些相互作用与Co2Fe0.8Cr0.2Al和Co2FeAl.Al进行比较.
- 建立格子障碍,磁性特性和火处理方法之间的相关性.
主要方法:
- 采用莫斯巴乌尔光谱法研究了Co2Fe0.5Cr0.5Al,Co2Fe0.8Cr0.2Al和Co2FeAl. 这三种光谱.
- 应用非平衡治疗来诱导缺陷.
- 分析的重点是超精细场和格子排序.
主要成果:
- 观察到价值电子度和平均超精度场之间的线性相关性,在Cr.置换时有不同的斜率.
- 与Co2Fe0.8Cr0.2Al.Al.相比,在Co2Fe0.5Cr0.5Al中发现了缺陷度和类型的显著变化.
- 超精细场与格子秩序/混乱程度之间建立了直接的相关性.
结论:
- 缺陷诱导的磁相互作用在基于CO2FeAl的化合物的磁性中起着关键作用.
- 格子障碍显著影响过精细场,有序的场所呈现出更高的值.
- 为 Co2Fe0.5Cr0.5Al 的缺陷恢复提出了最佳的回火条件,从而提高了其旋转潜力.
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