在范德瓦尔斯铁磁体Fe3GaTe2中低THz高旋转前行频率
Jiali Zhang1, Zhou Wang2,3, Ziyang Li1
1Key Laboratory of Micro and Nano Photonic Structures (MOE), School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Nano letters
|September 23, 2024
概括
Fe3GaTe2是一种二维磁性材料,具有高旋转前置频率和适度的阻尼. 它的动态磁性特性即使与相结合也在很大程度上保持不变,这表明了螺旋电子设备的潜力.
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:
- 二维 (2D) 磁性材料对于下一代自旋电子设备至关重要.
- Fe3GaTe2 是一个有前途的二维磁铁,以其高基里温度,铁磁性和垂直磁性异构性 (PMA) 而闻名.
研究的目的:
- 系统地研究Fe3GaTe2.2的动态磁性特性.
- 了解温度和合对这些属性的影响.
主要方法:
- 利用全光学探头技术研究动态磁性质.
- 在各种温度和磁场下测量了旋转前行频率 (f),有效PMA场 (Hkeff) 和吉尔伯特阻尼因子 (α).
- 研究了将Fe3GaTe2与薄层结合的效果.
主要成果:
- 观察到高旋转前行频率 (f) 在10K和70kOe时高达351.2GHz.
- 发现由于减少Hkeff. f随着温度的增加而减少 (242.8GHz在300K)
- 报告了适度的吉尔伯特阻尼因子 (α),随着温度的增加 (0.039在10K到0.075在300K).
- 证明与2nm的合只会轻微影响Hkeff,f和α,强调Fe3GaTe2.2的主导地位.
结论:
- Fe3GaTe2的动态磁性特性受到其有效的PMA场的强烈影响,该场取决于温度.
- 即使与相接,Fe3GaTe2也保持着其显著的动态磁性特性.
- 这些发现增强了对Fe3GaTe2的理解,并支持其在先进的2D自旋电子设备中的应用.
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