Magnetostatic Coupling Effects on Reversal Dynamics
Magnetostatic Coupling Effects on Reversal Dynamics
复制标题
静磁耦合对反转动力学的影响
DOI：
10.1099/1361-6463/ac62a1
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hao Chen, So Young
中科院分区：
文献类型：
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作者：
Hao Chen, So Young
利用Mumax 3微磁模拟软件，研究了静磁耦合对图案化盘形磁性元件组件开关动态特性的影响。利用有关孤立点的切换场和反转动力学的信息以及它们产生的杂散场的大小来设计耦合点的排列。在沿着线性点链反向级联的过程中，研究了单个点的磁化动力学。当相邻点具有相反的磁化方向时，磁化角的波动较大，这与较低的反转能垒相一致。分析数据以区分热场效应和相互作用场效应。虽然许多相互作用的纳米磁体系统已经根据经验模型进行了分析，但动态能垒方法提供了一种更详细和更直观的方法来研究简单的系统，如链和更复杂的组件，如人造自旋冰。
The effects of magnetostatic coupling on switching dynamics are investigated for assemblies of patterned disc-shaped magnetic elements using mumax 3 micromagnetic simulations. The arrangements of coupled dots were designed using information about the switching fields and reversal dynamics of isolated dots, as well as the magnitude of the magnetic stray fields they generate. The magnetization dynamics for individual dots was examined during a reversal cascade down a linear chain of dots. The magnetization angle fluctuated much more when neighboring dots have opposite magnetization directions, consistent with a lower energy barrier for reversal. The data were analyzed to differentiate thermal and interaction field effects. While many systems of interacting nanomagnets have been analyzed in terms of empirical models, the dynamical energy barrier approach offers a methodology with a more detailed and physically intuitive way to study both simple systems like the chain and more complex assemblies such as artificial spin ice.