Microwave assisted resonant domain wall nucleation in permalloy nanowires
Microwave assisted resonant domain wall nucleation in permalloy nanowires
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DOI：
10.1063/1.4764053
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发表时间：
2012-10
影响因子：
4
通讯作者：
M. Hayashi;Y. Takahashi;S. Mitani
中科院分区：
文献类型：
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作者：
M. Hayashi;Y. Takahashi;S. Mitani
我们设计了一套用于研究坡莫合金纳米线中微波辅助磁区壁形核的系统。我们发现，与脉冲场相比，当施加微波场时，成核场有显著的降低。在成核场的频率依赖关系中观察到一个明显的共振峰，该共振峰与均匀模铁磁共振频率相吻合。由于有明确的成核过程，与以往的报道相比，开关场的分布很小。结果表明，局域微波场为向磁性纳米线注入磁区壁提供了一种有效的工具。
We have designed a system to study microwave assisted domain wall nucleation in permalloy nanowires. We find a substantial decrease in the nucleation field when microwave fields are applied, in comparison to pulse fields. A clear resonance peak is observed in the frequency dependence of the nucleation field, which coincides with the uniform mode ferromagnetic resonance frequency. Owing to the well-defined nucleation process, the switching field distribution is small in contrast to previous reports. Our results show that localized microwave field provides an efficient tool for injecting domain walls into magnetic nanowires.