在NiPS3上合金驱动的抗铁磁Skymions单层:一个第一原则计算
Yanxia Wang1, Jianpei Xing1, Ying Zhao1
1Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|April 22, 2024
概括
研究人员理论上预测了2D磁铁中的内在反铁磁 (AFM) skyrmions 通过合金. 该研究表明,NiPS3中的Cr合金可以为先进的磁性存储应用提供可调节的AFM skyrmion直径.
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
- 这就是Spintronics.
背景情况:
- 拓磁性状态对于高密度磁性存储至关重要.
- 二维 (2D) 磁铁为纳米级拓旋转纹理提供平台.
- 观察性旋转结构,特别是反铁磁 (AFM) skyrmions,由于非中心对称2D磁铁的稀缺性,具有挑战性.
研究的目的:
- 从理论上预测二维磁铁中的内在AFM skyrmions的生成.
- 为了研究合金对AFM skyrmions的稳定性和尺寸的影响.
- 探索一种用于调制二维材料中的拓旋转纹理的新策略.
主要方法:
- 第一个原则计算,以调查磁性质.
- 在蜂巢磁铁中合金效应的理论预测.
- 在NiPS3.3中分析Dzyaloshinskii-Moriya相互作用.
主要成果:
- 内在AFM skyrmions可以通过与Cr原子合金在NiPS3单层中触发.
- 在Ni3/4Cr1/4PS3中AFM skyrmions的直径是可调节的,随着磁场的增加,从12nm降至4.4nm.
- AFM的斯基米安相在4 T的外部磁场上保持稳定.
结论:
- 与磁性元素合金提供了一个有效的策略,用于生成和控制2D磁铁的拓旋转纹理.
- 这些发现为设计新型磁性存储设备打开了道路.
- 这项工作展示了工程 2D 磁铁的潜力,用于自旋电子应用.
相关概念视频
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
02:37Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K