对 skyrmionium, skyrmions 和 antiskyrmions 的动力学,钉钉和杆效应进行比较
J C Bellizotti Souza1, N P Vizarim2, C J O Reichhardt3
1POSMAT-Programa de Pós-Graduação em Ciência e Tecnologia de Materiais São Paulo State University (UNESP) School of Sciences, Bauru 17033-360, SP, Brazil.
Journal of physics. Condensed matter : an Institute of Physics journal
|February 28, 2025
概括
斯基尔米翁,反斯基尔米翁和斯基尔米翁表现出不同的行为,具有缺陷和不对称的潜力. 斯基尔米奥尼提供了更快的运动,但容易被钉住,而斯基尔米奥尼和反斯基尔米奥尼表现出更强烈的拉切特效应.
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:
- 像skyrmions这样的拓磁性纹理对于下一代数据存储和自旋电子设备至关重要.
- 了解它们在外部刺激下和存在缺陷时的动态对于设备设计至关重要.
研究的目的:
- 为了研究和比较 skyrmions,antiskyrmions 和 skyrmionium 的驱动动力学.
- 分析它们与各种类型的障碍和潜力的相互作用.
- 阐明马格努斯力和拓变换对它们运动的影响.
主要方法:
- 模拟磁纹的驱动动力学.
- 分析与随机障碍,圆形缺陷和不对称潜力的相互作用.
- 检查固定效应,速度变化和拓过渡.
主要成果:
- 斯基尔米翁和反斯基尔米翁加速沿线缺陷,但在穿越障碍时减速;斯基尔米翁表现出相反的行为.
- 斯基尔米奥尼表现出比斯基尔米翁更快的运动,但更容易受到固定.
- 所有纹理都在不对称的基板上显示二极管和拉切特效应,而 skyrmions/antiskyrmions 由于马格纳斯力而显示出更强烈的拉切特效应.
结论:
- 斯基米翁,反斯基米翁和斯基米翁的独特动态行为受到其拓性质和与缺陷的相互作用的强烈影响.
- 斯基尔米奥尼的独特特性既为更快的动态提供了机会,也为稳定性和固定性带来了挑战.
- 观察到的二极管和杆效应凸显了在不对称的潜在景观中利用这些纹理的潜力,以实现新型设备功能.
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