论文标题
曲率驱动的AC辅助磁性域壁的蠕变动力学
Curvature-driven AC-assisted creep dynamics of magnetic domain walls
论文作者
论文摘要
超薄铁磁膜中微米尺寸的磁性域的动力学被猝灭障碍速度大大减慢，以至于在环境温度下自发的弹性张力崩溃变得无法观察到。通过磁光成像，我们表明弱零偏置AC磁场可以帮助这种曲率驱动的塌陷，使气泡面积以可测量的速度减少，尽管相同的曲率对由可比DC场驱动的平均蠕变运动具有可忽略的效果。一个分析模型定量解释了这一现象。
The dynamics of micrometer-sized magnetic domains in ultra-thin ferromagnetic films is so dramatically slowed down by quenched disorder that the spontaneous elastic tension collapse becomes unobservable at ambient temperature. By magneto-optical imaging we show that a weak zero-bias AC magnetic field can assist such curvature-driven collapse, making the area of a bubble to reduce at a measurable rate, in spite of the negligible effect that the same curvature has on the average creep motion driven by a comparable DC field. An analytical model explains this phenomenon quantitatively.
