在二维铁磁铁Fe3GaTe2中,在室温下有明显的 skyrmion 阶段
Xiaowei Lv1, Hualiang Lv2, Yalei Huang3
1Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai, 200438, PR China.
Nature communications
|April 16, 2024
概括
在二维磁铁中的室温 skyrmions 对于 spintronics 是至关重要的. 这项研究观察了Fe3GaTe2中的混合型 skyrmions,为先进的拓设备铺平了道路.
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
- 纳米技术 纳米技术
背景情况:
- 室温 skyrmion 阶段对于开发基于拓的自旋电子器件至关重要.
- 发现二维 (2D) 范德瓦尔斯磁体已经将磁场扩展到低维系统.
- 在2D磁铁中创建多个 skyrmion 阶段仍然是一个重大挑战,特别是在室温以上.
研究的目的:
- 报告在室温铁磁铁中对混合型斯基米翁的实验观测.
- 为了研究不同 skyrmion 阶段的共存及其热稳定性.
- 探索使用不同 skyrmion 阶段的 2D 旋转器件的潜力.
主要方法:
- 在Fe3GaTe2.2中对混合型斯基米翁 (布洛克和混合型) 的实验观测.
- 在各种成像条件下分析磁强度.
- 补充模拟以了解磁相互作用.
主要成果:
- 实验证实了自发的布洛赫 skyrmions 作为Fe3GaTe2.2.中的磁性基本状态.
- 观察与Bloch skyrmions一起共存的混合条纹领域.
- 创建高温稳定性高达328K的混合型 skyrmions.
结论:
- 双极和Dzyaloshinskii-Moriya相互作用之间的相互作用驱动了观察到的 skyrmion 阶段.
- 这些发现证明了Fe3GaTe2在室温下容纳多个 skyrmion 阶段的潜力.
- 这项研究为设计具有增强功能的二维自旋电子设备开辟了新的途径.
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