在金属多层材料系统中Neel型和Bloch-Néel混合Skyrmion的过渡
Binbin Wang1,2,3, Núria Bagués1,2,4, Shuyu Cheng5
1Center for Electron Microscopy and Analysis, Ohio State University, Columbus, OH, 43212, USA.
Advanced materials (Deerfield Beach, Fla.)
|October 17, 2025
概括
研究人员在多层[Pt/Co/Cu]中发现了磁性 skyrmion 类型的室温共存. 脉冲电流允许转换和控制这些skyrmions用于spintronic应用.
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:
- 磁性 skyrmions 是受拓保护的旋转结构,有可能用于旋转器件.
- 控制 skyrmion 类型和稳定性对于高级应用至关重要.
研究的目的:
- 为了研究不同磁性 skyrmion 类型在 [Pt/Co/Cu] 多层中的室温共存.
- 探索使用脉冲电流来操纵斯基米安的状态和稳定性.
- 了解电流脉冲对斯基米翁稳定性的热效应.
主要方法:
- 使用分子束表 (MBE) 的[Pt/Co/Cu]多层的生长.
- 使用脉冲电流在Néel型和Bloch-Néel混合型 skyrmions之间切换.
- 研究电流脉冲对 skyrmion 动态的热影响.
主要成果:
- 证明了Néel类型和Bloch-Néel混合型 skyrmions的室温共存.
- 通过脉冲电流实现了对 skyrmion 类型和稳定性的控制.
- 确定了用于 skyrmion 操纵的广泛磁相空间.
结论:
- 这项研究为金属多层中多种类型的 skyrmion 状态提供了前所未有的控制.
- 这些发现为spintronic应用铺平了道路,比如二进制数据编码.
- 提供了一个用于操纵各种 skyrmion 配置的新框架.
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