在2D AFM三元V基石基因单层中依赖应变的磁性排序切换
Kaijuan Pang1, Xiaodong Xu2, Yadong Wei2
1School of Physics, Harbin Institute of Technology, Harbin 150001, China. jiangyy@hit.edu.cn.
Nanoscale
|August 7, 2023
概括
抗铁磁 (AFM) VXYSe4单层表现出可调节的磁性特性. 应变工程可以将它们的过渡温度提高到室温以上,使它们适合先进的纳米设备.
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
- 这就是Spintronics.
背景情况:
- 抗铁磁材料为高速旋转器件提供了潜力,因为它们缺乏宏观磁矩.
- 两维 (2D) 三元V基石灰化物 (VXYSe4) 正成为有前途的候选物.
研究的目的:
- 研究2D VXYSe4单层 (X,Y = Al,Ga) 的磁性特性.
- 探索应变对它们的磁性排序和过渡温度的影响.
- 评估它们对旋转电子应用的潜力.
主要方法:
- 密度函数理论 (DFT) 的计算.
- 蒙特卡洛的模拟.
- 磁性异构性计算. 磁性异构性计算. 磁性异构性计算.
主要成果:
- 在VGa2Se4中识别的zigzag2-antiferromagnetic (AFM) 排序,尼尔温度为18K.
- 在VAl2Se4 (47K) 和VAlGaSe4 (33K) 中观察到的齐克扎克1-AFM合.
- 确定容易磁化轴与y轴平行.
- 通过双轴拉伸,证明了从AFM到铁磁 (FM) 状态的可调性.
- 表明压缩应变可以使过渡温度高于室温.
- 在应力下确认了强大的内平面磁性异构性.
结论:
- VXYSe4单层是稳定的AFM材料,具有可调节的磁性.
- 应变工程提供了一条可行的路线来控制它们的磁性行为并提高过渡温度.
- 这些发现为设计基于AFM的先进纳米设备提供了洞察力.
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