Abstract

The dynamics of a transverse domain wall in a narrow magnetic permalloy nanowire in an external field is studied by the method of micromagnetic simulation. It was found that in the limit of a very small nanowire width (less than 40 nm), a precession of the domain wall is observed, accompanied by a change in its chirality. It is shown that the precession frequency increases with an increase in the external field and with an increase in the damping constant and decreases with an increase in the nanowire width. This effect imposes restrictions on the possibility of reducing the width of the nanowire used to create racetrack memory.

中文翻译：

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窄磁性纳米线中的畴壁旋进

摘要

通过微磁模拟方法研究了窄磁坡莫合金纳米线在外场中横向畴壁的动力学。发现在非常小的纳米线宽度（小于40nm）的极限中，观察到畴壁的进动，伴随其手性的变化。结果表明，进动频率随外部电场的增加和阻尼常数的增加而增加，随纳米线宽度的增加而减小。该效果对减小用于创建赛道记忆的纳米线的宽度的可能性施加了限制。