在纳米点中超越固定尺寸的skyrmions:可切换的多稳定性与铁磁环
Mateusz Zelent1, Maciej Krawczyk2, Konstantin Y Guslienko3,4,5
1Faculty of Physics and Astronomy, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 2, PL-61-614 Poznan, Poland.
Nano letters
|September 11, 2025
概括
研究人员开发了一种新的方法,使用磁纳米环来控制磁性 skyrmions,提高它们的稳定性,以便在先进的存储器件中使用.
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 是具有数据存储潜力的拓保护的旋转纹理.
- 控制skyrmion的稳定性和大小对于设备应用至关重要.
- 现有的方法通常依赖于Dzyaloshinskii-Moriya相互作用,限制了材料选择.
研究的目的:
- 为了展示一种用于控制和稳定磁性 skyrmions的新方法.
- 调查工程磁静电场用于斯基米翁操纵的使用.
- 为潜在的多位内存应用探索skyrmion多稳定性.
主要方法:
- 对静磁场效应的分析建模.
- 在多层纳米结构中对 skyrmion 动力学的微磁模拟.
- 使用铁磁纳米环来产生空间工程流浪场.
主要成果:
- 来自Co/Pd纳米环的空间工程磁静电场显著提高了Ir/Co/Pt纳米点中的 skyrmion稳定性.
- 即使没有Dzyaloshinskii-Moriya相互作用,也可以实现Skyrmion稳定.
- 证明精确控制斯基尔米翁的大小和稳定性.
- 观察到skyrmion多稳定性与高能障碍超过热波动.
- 通过使用磁场脉冲,成功地将 skyrmions 切换到元稳定状态.
结论:
- 工程磁静电场提供了一个强大的方法来控制磁性 skyrmions.
- 观察到的多稳定性和高能障碍对强大的多位内存存储有希望.
- 这种方法为先进的自旋电子设备和新型记忆技术提供了一条途径.
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