范德瓦尔斯反铁磁体的二维内在铁磁体
Naihua Miao1,2, Bin Xu3, Linggang Zhu1,2
1School of Materials Science and Engineering, Beihang University , Beijing 100191, China.
Journal of the American Chemical Society
|February 6, 2018
概括
研究人员在2D CrOX半导体中发现了内在的铁磁性,为自旋电子应用提供了从抗铁磁体中创建这些材料的新途径.
科学领域:
- 材料科学
- 凝聚物质物理学
- 纳米技术
背景情况:
- 本质上的铁磁二维半导体对于纳米级的自旋技术至关重要.
- 目前的方法依赖于铁磁性散体晶体,限制了材料选择.
- 从散装的反铁磁体制造二维内在铁磁体是一个尚未探索的领域.
研究的目的:
- 从散装的反铁磁铁制造二维内在铁磁铁的可行性.
- 为了发现新的二维内在铁磁材料.
- 评估他们对自旋电子的潜力.
主要方法:
- 在研究二维CrOX (CrOCl和CrOBr) 单层磁性时,使用了初始计算.
- 分析的重点是铁磁排序,旋转极化和库里温度.
- 还评估了稳定性和制造潜力.
主要成果:
- 在单层 CrOCl 和 CrOBr (2D CrOX) 中发现内在铁磁性.
- 这些材料表现出强大的铁磁排序,显著的旋转极化和高的基里温度.
- 2D CrOX单层显示出优异的动态和热稳定性,并有可能从散装反铁磁体中轻松制造.
- 2D CrOCl (160 K) 的基里温度超过了GaMnAs (155 K) 的基里温度,并且可以通过应变进一步提高.
结论:
- 这项研究提出了一种新的方法,用于从抗铁磁性散装材料中合成二维内在铁磁体.
- 2D CrOX单层是旋转电子应用的一个有前途的新平台.
- 这些发现为设计和制造先进的旋转器件开辟了新的途径.
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