用表面声波创建和移动skirmions的有序创建和运动
Ruyi Chen1, Chong Chen1, Lei Han1
1Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Beijing Innovation Center for Future Chip, Tsinghua University, Beijing, 100084, China.
Nature communications
|July 22, 2023
概括
研究人员使用表面声波 (SAW) 在多层[Co/Pd]中实现了有序的磁性 skyrmion 生成和运动,使用最小的 skyrmion Hall 效应 (SkHE). 这一突破为自旋电子设备提供了新的可能性.
科学领域:
- 这就是Spintronics.
- 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
背景情况:
- 磁性 skyrmions,在拓上非微不足道的准粒子,有望用于spintronic应用.
- 有效地操纵skyrmions,特别是抑制skyrmion霍尔效应 (SkHE),对于实用的技术至关重要.
- 在铁磁体中实现可控的 skyrmion 运动,而 SkHE 是可以忽略不计的,这仍然是一个重大挑战.
研究的目的:
- 通过实验实现磁性 skyrmions 的有序生成和电流驱动运动,其 SkHE.HE 是可以忽略不计的.
- 为了研究表面声波 (SAW) 对[Co/Pd]多层中 skyrmion 行为的影响.
- 探索新的操作策略,以拓单元在旋转电子学.
主要方法:
- 将[Co/Pd]多层嵌入到表面声波 (SAW) 延迟线中.
- 刺激纵向泄漏SAW诱导应变和热效应.
- 观察电流诱导的 skyrmion 运动并分析 SkHE.
主要成果:
- 成功实现了磁性 skyrmions的有序生成.
- 观察到电流驱动的 skyrmion 运动,SkHE 值得忽略.
- 归因于被抑制的SkHE是由于SAW激发而导致系统内的能量再分配.
结论:
- 表面声波提供了一种有效的方法来操纵磁性 skyrmions 与抑制 SkHE.
- 这种方法为skyrmionics和spin音声电子开辟了新的途径.
- 这些发现为未来在拓单元操纵领域的发现铺平了道路.
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