论文标题
限制对纳米磁体热诱导波动的影响
The effect of confinement on thermally induced fluctuations in nanomagnets
论文作者
论文摘要
我们研究了由随机磁场激发的纳米磁体中的磁化动力学，以模拟微磁性框架中的温度。研究了由结构的有限尺寸产生的限制的影响，我们可视化内部镁模式的空间扩展。此外，我们确定了磁通模式的温度依赖性，并专门集中在低频边缘模式上，这些模式被发现显示出与C-和S态之间切换相关的波动，从而提出了能量屏障。我们将这种波动的行为分类为三种不同的制度，并使用Arrhenius定律计算相关的能屏障。
We study the magnetization dynamics in nanomagnets excited by stochastic magnetic fields to mimic temperature in a micromagnetic framework. The effect of confinement arising from the finite size of the structures is investigated, and we visualise the spatial extension of the internal magnon modes. Furthermore, we determine the temperature dependence of the magnon modes, and focus specifically on the low frequency edge modes, which are found to display fluctuations associated with switching between C- and S-states, thus posing an energy barrier. We classify this fluctuating behaviour in three different regimes, and calculate the associated energy barriers using the Arrhenius law.
