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Applied Physics 2022
缺陷对钴纳米环磁特性的影响
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Abstract:
基于蒙特卡洛方法与快速傅里叶变换微磁学方法，模拟了缺陷钴纳米环的磁化特性。研究发现，缺陷纳米环磁滞回线的过渡状态较多，系统自旋组态较丰富。当缺陷的Y值不同时，系统均出现双稳态。系统的剩磁与Y值明显相关：当Y值较小而系统保持对称状态时，剩磁接近于零；随着Y值的增大，系统的剩磁逐渐增大；当Y值增大到一定范围内，剩磁变化减小，出现一个平台区；继续增大Y值，剩磁又逐渐减小。模拟结果与实验结果一致。
Based on Monte Carlo method and fast Fourier transform micromagnetism method, the magnetization characteristics of defective cobalt nanorings are simulated. It is found that there are many transition states of hysteresis loops in defective nanorings, and the spin configurations of the systems are rich. When the Y value of the defects is different, the systems appear bistable. The remanence of the systems is obviously related to the Y value: when the Y value is small and the systems remain symmetrical, the remanence is close to zero; with the increase of Y value, the remanence of the system increases gradually; When the Y value increases to a certain range, the change of remanence decreases and a platform area appears; as the Y value continues to increase, the remanence decreases gradually. The simulation results are consistent with the experimental results.
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