在W/CoFeB上对skyrmion稳定性和传输的计算研究
Tsz Chung Cheng1, Lin Zhang2, Yuichiro Kurokawa2
1Graduate School of Information Science and Electrical Engineering, Kyushu University, Fukuoka, 819-0382, Japan. jed.cheng@mag.ed.kyushu-u.ac.jp.
Scientific reports
|March 5, 2025
概括
研究人员为旋转器件探索了β- (β-W). 这种材料可以实现高速,小型的天体运输,克服了新型计算应用的先前限制.
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:
- 斯基尔米昂是被拓保护的磁性结构,由自旋极化电流驱动.
- 斯基米翁的运输速度受到其尺寸的限制,这阻碍了在自旋电子设备中的小型化.
- 实现高速运输,小尺寸和低运行电流同时呈现出重大挑战.
研究的目的:
- 研究β- (β-W) 作为一种重金属层,用于增强体运输.
- 为了克服螺旋电子应用中 skyrmion 大小和速度的局限性.
- 探索β-W/CoFeB异构结构在新型计算设备中的潜力.
主要方法:
- 在β-W/CoFeB系统中界面Dzyaloshinskii-Moriya相互作用 (DMI) 的表征.
- 估计斯基米翁生成所需的外部磁场.
- 在旋转轨道扭矩 (SOT) 下测量 skyrmion 运输速度.
主要成果:
- 界面DMI估计为1.5mJ/m2,所需的外部电场为0.1T,证实了现实的参数.
- 大约10纳米直径的 skyrmions 在约40米/秒的速度成功运输.
- 这项研究证明了β-W在实现高效的 skyrmion 运动方面的有效性.
结论:
- β- (β-W) 呈现出高旋转霍尔角,这对于高效的旋转电流产生至关重要.
- 开发的β-W/CoFeB系统促进了高速度的鱼运输,解决了小型化挑战.
- 这些发现为基于skyrmion的非传统计算设备铺平了道路,包括赛道内存和逻辑门.
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