Simulating the Maximum Domain Wall Speed in a Magnetic Nanowire
Simulating the Maximum Domain Wall Speed in a Magnetic Nanowire
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模拟磁性纳米线的最大畴壁速度
DOI：
10.1109/tmag.2006.880141
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发表时间：
2006
影响因子：
2.1
通讯作者：
A. Kunz
中科院分区：
文献类型：
--
作者：
A. Kunz
利用Landau-Lifshitz-吉尔伯特（LLG）运动方程模拟了坡莫合金纳米线中畴壁运动的动力学。模拟结果的吉尔伯特阻尼参数α和纳米线宽度的范围内的畴壁速度。最大畴壁速度与α无关。畴壁的速度可以通过增加纳米线宽度来增加，但这降低了临界场。对于低于临界场的外加场，壁沿导线均匀地沿着移动，并且壁的速度随着驱动场的增加而增加。这种行为与当前的分析模型是一致的，然而，该模型高估了畴壁速度和临界场的值
The dynamics of domain wall motion in permalloy nanowires have been simulated utilizing the Landau-Lifshitz-Gilbert (LLG) equation of motion. The simulation results are presented in terms of the domain wall speed for ranges of the Gilbert damping parameter alpha and nanowire width. The maximum domain wall speed is independent of alpha. The speed of the domain wall can be increased by increasing the nanowire width, but this lowers the critical field. For applied fields below the critical field, the wall moves uniformly along the wire and the speed of the wall increases with increases in the driving field. This behavior is consistent with current analytic models; however, the models overestimate both the value of the domain wall speed and the critical field