在铁磁Heusler合金 Co2的MnAl基磁性三层中,大旋转厅效率和电流诱导的磁化切换
Mingzhi Wang1, Chang Pan1, Nian Xie1
1Shanghai Key Laboratory of Special Artificial Microstructure Materials and School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 4, 2024
概括
研究人员在Co2MnAl海斯勒合金中发现了高旋转霍尔效率,这对于开发先进的旋转轨道扭矩装置至关重要. 这一发现增强了铁磁材料用于下一代自旋电子应用.
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:
- 旋转厅效率 (ξ) 量化了电荷到旋转转换,这对于旋转轨道扭矩 (SOT) 装置至关重要.
- 铁磁材料越来越多地被用作SOT设备中的高效旋转源.
- 铁磁材料中的高 ξ对于提高SOT设备性能至关重要.
研究的目的:
- 在基于铁磁Heusler合金Co2MnAl (CMA) 的磁三层中实验确定旋转霍尔效率 (ξ).
- 调查CMA作为SOT应用的高性能旋转源材料的潜力.
- 探索CMA中的化学排序与其旋转霍尔效率之间的关系.
主要方法:
- 使用电流诱导歇斯底里循环转移技术测试旋转霍尔效率的实验测量.
- 基于CO2MnAl (CMA) 的磁三层的制造和表征.
- 分析磁化切换行为,有和没有外部磁场.
主要成果:
- 对于Co2MnAl (CMA) 的B2阶段,观察到0.077的显著旋转霍尔效率 (ξ).
- 在CMA的无序阶段测量了0.029的旋转霍尔效率 (ξ).
- 成功演示了三层磁化切换,无论有没有辅助磁场.
结论:
- 在Co2MnAl中的化学排序显著提高了其旋转厅效率.
- Co2MnAl是一种有前途的铁磁材料,可用于开发高效的旋转轨道扭矩装置.
- 这些发现为设计基于铁磁铁的先进SOT设备开辟了新的途径.
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