Current-induced domain-wall depinning in curved Permalloy nanowires
Current-induced domain-wall depinning in curved Permalloy nanowires
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DOI：
10.1063/1.3062828
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发表时间：
2009-04-01
影响因子：
3.2
通讯作者：
Meier, Guido
中科院分区：
文献类型：
--
作者：
Nahrwold, Gesche;Bocklage, Lars;Meier, Guido
弯曲坡莫合金 (Ni(80)Fe(20)) 纳米线中的畴壁通过纳秒电流脉冲和磁场脱钉。观察到脱钉概率对脉冲长度的显着依赖性。我们测量特征频率为 270 MHz 的振荡依赖性。用于纳米线的坡莫合金的质量对于有效的畴壁脱钉至关重要。通过在加热的基底上溅射坡莫合金，我们能够显着降低比电阻，该比电阻直接对应于畴壁的脱钉场。 (c) 2009 年美国物理研究所。 [DOI：10.1063/1.3062828]
Domain walls in curved Permalloy (Ni(80)Fe(20)) nanowires are depinned by nanosecond current pulses and magnetic fields. A significant dependence of the depinning probability on the pulse length is observed. We measure an oscillatory dependence with a characteristic frequency of 270 MHz. The quality of the Permalloy used for the nanowires is crucial for efficient domain-wall depinning. By sputtering Permalloy on heated substrates we are able to considerably decrease the specific resistance that is found to directly correspond to the depinning field of the domain wall. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3062828]