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Updated: May 16, 2025

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无电场旋转轨道扭矩切换的Canted范德瓦尔斯磁铁的磁场
Bing Zhao1, Lalit Pandey1,2, Khadiza Ali1,3
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg SE-41296, Sweden.
ACS nano
|March 31, 2025
概括
研究人员使用旋转轨道扭矩 (SOT) 在范德瓦尔斯磁铁中演示了无磁场磁化切换. 在Fe5GeTe2/Pt异构中取得的这一突破为在室温下运行的高能效自旋电子设备铺平了道路.
科学领域:
- 这就是Spintronics.
- 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
背景情况:
- 旋转轨道扭矩 (SOT) 对于节能旋转器件至关重要.
- 范德瓦尔斯 (vdW) 磁铁为SOT应用提供可调节的特性.
- 在vdW磁铁中需要无场SOT开关,以便在实践中使用.
研究的目的:
- 为了证明在VDW磁铁中节能,无磁场的SOT磁化开关.
- 为了研究倾斜磁性异构在SOT切换中的作用.
- 探索Fe5GeTe2/Pt异构结构在自旋电子应用中的潜力.
主要方法:
- 制造Fe5GeTe2 / Pt异构结构的制造.
- 使用异常的霍尔电气检测用于磁化读数.
- 执行第二波霍尔测量以量化旋转霍尔导电性.
主要成果:
- 在Fe5GeTe2/Pt设备中实现了无场和确定性SOT切换,直至室温.
- 确定了Fe5GeTe2的倾斜磁性异构性作为切换的机制.
- 测量了高自旋霍尔导电性 (σ ~ 3 × 10^5 ħ / 2e Ω−1m−1) 和低SOT有效阻尼场 (0.06mT每MA/cm2).
结论:
- 在室温下,在一个倾斜的vdW磁铁 (Fe5GeTe2) 中,证明了高效且无电场的SOT切换.
- 突出了对SOT现象的内在倾斜磁性异质性的重要性.
- 展示了基于Fe5GeTe2的异构结构对于先进的自旋电子设备的潜力.
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