通过三层纳米磁铁的层间合,通过垂直延伸方形,kagome和三角旋转冰格子来定制马格农模式
Julius de Rojas1,2, Del Atkinson1, Adekunle O Adeyeye1
1Department of Physics, Durham University, Durham DH1 3LE, United Kingdom.
概括
通过在纳米磁铁中改变非磁性层厚度来控制人工旋转冰中的磁性相互作用,可以实现多模式的磁性可编程性. 这一进步为微波和信息处理应用中的新型磁性元材料提供了潜力.
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:
- 人工旋转冰 (ASI) 系统提供可调节的磁性.
- 了解高频磁化动态对于先进的应用至关重要.
- 三层纳米磁铁提供了一个控制磁相互作用的平台.
研究的目的:
- 研究铁磁三层纳米磁铁中非磁层厚度对ASI静态和动态磁性质的影响.
- 探索 ASI 格子的不同几何配置 (方形,kagome,三角形).
- 通过层间合来证明多模式的磁可编程性.
主要方法:
- 制造具有光刻图案的Ni81Fe19/Cu/Ni81Fe19三层纳米磁铁,具有不同厚度的铜 (2nm和40nm).
- 在正方形,kagome和三角形ASI网格中研究磁静态和高频动态.
- 对磁静态相互作用和由此产生的磁共振模式的分析.
主要成果:
- 非磁性层厚度变化为磁化状态和磁共振模式提供了精细的控制.
- 与方格格子相比,Kagome和三角形ASI格子具有增强的功能,允许调整额外的模式和共振间距.
- 在 ASI 阵列中展示了对垂直层间相互作用的控制,超越了准2D 单一磁层.
结论:
- 三层ASI系统中的垂直层间合可实现多模式的磁性可编程性.
- 这些发现为开发用于微波和信息处理的先进磁性超材料铺平了道路.
- 该研究突出了ASI的潜力,为下一代自旋电子设备量身定制的三层结构.
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