室温范德瓦尔斯铁磁转换通过旋转轨道扭矩
Weihao Li1,2, Wenkai Zhu1,2, Gaojie Zhang3,4
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
Advanced materials (Deerfield Beach, Fla.)
|October 27, 2023
概括
范德瓦尔斯 (vdW) 铁磁体的室温电转换是使用旋转轨道扭矩 (SOT) 实现的. 在VDW铁磁铁Fe3GaTe2中的这一突破为先进的自旋电子设备铺平了道路.
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:
- 由于其独特的特性,范德瓦尔斯 (vdW) 磁铁为下一代自旋电子设备提供了潜力.
- 一个关键的挑战是vdW铁磁体的低基里温度,阻碍室温电气操纵.
- 之前的研究还没有实现在室温下VDW铁磁体中电控磁化.
研究的目的:
- 为了证明一个VDW铁磁体中垂直磁化的室温电转换.
- 为了研究旋转轨道扭矩 (SOT) 操纵VDW铁磁磁化的有效性.
- 探索Fe3GaTe2/Pt双层在自旋电子应用中的潜力.
主要方法:
- 利用旋转轨道扭矩 (SOT) 来切换Fe3GaTe2.2的垂直磁化.
- 在实验中使用了Fe3GaTe2/Pt双层.
- 使用波测量量量化确定SOT效率.
主要成果:
- 在室温下使用SOT成功切换了Fe3GaTe2的垂直磁化.
- 实现了低电流密度的磁化开关,电流密度为1.3 × 10^7 A cm^-2.
- 确定了高的SOT效率 (ξDL ≈ 0.28),超过了传统铁磁器件的效率.
结论:
- 通过SOT在室温下对VDW铁磁铁Fe3GaTe2进行电转换是可行的.
- 在Fe3GaTe2/Pt双层中高的SOT效率对旋转电子应用具有前景.
- 这项工作为开发基于铁磁铁的vdW旋磁器件提供了基础.
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