热旋波噪声作为Dzyaloshinskii-Moriya相互作用的探测器
Aurore Finco1, Pawan Kumar1, Van Tuong Pham2,3
1Laboratoire Charles Coulomb, Université de Montpellier, CNRS, 34095 Montpellier, France.
Physical review letters
|October 12, 2025
概括
研究人员开发了一种使用磁噪声检测界面Dzyaloshinskii-Moriya相互作用 (DMI) 的新方法. 这种技术推断DMI信号和强度从旋波噪声在磁性薄膜.
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:
- 界面的Dzyaloshinskii-Moriya相互作用 (DMI) 对于稳定薄膜中的奇拉磁态至关重要.
- DMI的信号和强度决定了磁对象的特性,如拓和电流驱动的操纵.
- 现有的定量DMI测量技术包括域墙,自旋波和自旋轨道扭矩研究.
研究的目的:
- 为DMI检测提出和验证一种基于自旋波的定性方法.
- 为了利用有限的热旋波产生的磁噪声进行DMI分析.
- 为了将噪声特征与DMI标志和skyrmion性质相关联.
主要方法:
- 使用扫描空 (NV) 中心放松计来探测磁噪声.
- 在域壁和 skyrmions 中分析来自受限热自旋波的磁噪声.
- 数字模拟和实验验证拟议方法的验证.
主要成果:
- 从检测到的磁噪声的幅度可以推断出DMI的标志.
- 噪声振幅受到自旋波分散的非互惠的影响.
- 在 skyrmions 周围的噪声分布揭示了它们的 Néel 或 Bloch 自然,表明 DMI 强度.
结论:
- 拟议的扫描NV中心放松度法提供了一种定性方法来检测接口DMI.
- 这种技术提供了对DMI标志,强度和 skyrmion 奇拉性的洞察.
- 该方法促进了在薄膜中理解和操纵奇拉磁态的进步.
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