工程 skyrmion 从旋转螺旋在过渡金属多层中的工程 skyrmion
Banasree Sadhukhan1,2,3
1Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203 Chennai, Tamil Nadu, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|December 11, 2024
概括
这项研究探讨了4d/Fe/Ir(111) 磁性多层中 skyrmion 的生成. Rh/Fe/Ir{111) 显示稳定的斯基米安相高达90K,为旋转器件提供了潜在的潜力.
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
- 这就是Spintronics.
背景情况:
- 斯基尔米恩是受拓保护的,在各种科学领域中具有关键性的粒子状磁场配置.
- 了解磁多层中 skyrmion 的形成和稳定性,是开发先进电子设备的关键.
- 4d/Fe/Ir(111) 系统为研究过渡金属对磁相互作用的影响提供了一个平台.
研究的目的:
- 为了研究4d/Fe/Ir(111) 磁性多层中自旋螺旋产生的 skyrmions.
- 分析不同4d过渡金属 (Y,Zr,Nb,Mo,Ru,Rh) 对磁相互作用的影响.
- 为了确定skyrmion在外部磁场和温度下相位稳定的条件.
主要方法:
- 理论上研究同源的海森堡交换和Dzyaloshinskii-Moriya相互作用.
- 在Fe-3d轨道中进行交换相互作用的轨道分解分析.
- 旋转动力学和蒙特卡洛模拟以研究磁性基态和相位过渡.
主要成果:
- 由于Fe-3d,4d和Ir-5d杂交,由4d带填充调节,产生了强烈的交换挫折.
- 磁基态是ab平面 (1-2.5nm周期) 中的旋转螺旋,Y/Fe/Ir(111) 的波长比Rh/Fe/Ir(111) 大.
- 一个~12 T的外部磁场将旋转螺旋变形为孤立的 skyrmions,在Rh/Fe/Ir中转换为一个 skyrmion网格,在~18 T左右.
结论:
- 这项研究阐明了4d过渡金属在介导磁相互作用和旋转螺旋形成中的作用.
- Rh/Fe/Ir(111) 证明了通过外部磁场产生和操纵斯基米安的潜力.
- 在Rh/Fe/Ir(111) 中的磁性 skyrmion 阶段在高达90 K的热波动下是稳定的.
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