TMN (TM = V,Cr,Mn,Fe,Co) 单层 - 一个新的非范德瓦尔斯二维磁铁类别
Leonid Ilyich Kushchuk1, Alexey Ivanovich Kartsev1,2,3
1Bauman Moscow State Technical University, Moscow, 105005, Russia. karec1@gmail.com.
Nanoscale
|April 2, 2025
概括
过渡金属化物 (TMN) 单层显示出对自旋电子设备有前途的磁性特性. 计算揭示了各种磁基状态,并预测了高基里温度,表明了先进应用的潜力.
科学领域:
- 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
- 计算化学的计算化学
背景情况:
- 过渡金属化物 (TMN) 在材料科学中至关重要.
- 了解二维材料的磁性和结构性质是新型电子应用的关键.
研究的目的:
- 系统地研究四边形 (t-) 和六边形 (h-) 过渡金属化物 (TMN) 单层的结构和磁性特性.
- 为了确定磁性基态,交换相互作用和磁性异构性参数.
- 预测潜在的自旋电子应用的临界温度和激活能量.
主要方法:
- 用第一原则计算来研究TMN单层.
- 海森堡模型被用来提取磁相互作用参数.
- 蒙特卡罗 (MC) 模拟和可变细胞推推弹性带 (VC-NEB) 方法被用于温度和动力学研究.
主要成果:
- 所有检查的TMN单层都倾向于磁性基态,其中一半呈现铁磁 (FM) 和一半反铁磁 (AFM) 配置.
- 对于h-MnN和h-CoN,磁性异构性能量在43至633μeV之间.
- 预测h-MnN的库里温度大约为339K,CrN转换的激活能量为1.22 eV.
结论:
- TMN单层具有在磁性和自旋电子设备中的应用的巨大潜力.
- 多样化的磁性行为和预测的热稳定性使它们成为未来技术的有吸引力的候选人.
- 第一原则计算为这些二维材料的基本性质提供了宝贵的见解.
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