Domain Nucleation and Annihilation in Uniformly Magnetized State under Current Pulses in Narrow Ferromagnetic Wires
Domain Nucleation and Annihilation in Uniformly Magnetized State under Current Pulses in Narrow Ferromagnetic Wires
复制标题
窄铁磁线中电流脉冲下均匀磁化状态下的磁畴成核和湮灭
DOI：
10.1143/jjap.45.l1322
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发表时间：
2006
影响因子：
1.5
通讯作者：
Y. Otani
中科院分区：
文献类型：
--
作者：
Y. Togawa;T. Kimura;K. Harada;T. Akashi;T. Matsuda;A. Tonomura;Y. Otani
我们通过洛伦兹显微镜和电子全息术研究了窄坡莫合金线中电流驱动的磁化动力学。发现电流脉冲可以将磁性结构转变为低于居里温度的均匀磁化状态。包括反转磁畴在内的多种磁态是以低概率随机获得的。在大多数观测到的磁态中发现的涡旋动力学似乎在触发磁化反转方面发挥着关键作用。
We investigate the current-driven magnetization dynamics in narrow Permalloy wires by means of Lorentz microscopy and electron holography. Current pulses are found to transform the magnetic structure in the uniformly magnetized state below the Curie temperature. A variety of magnetic states including reversed magnetic domains are randomly obtained in low probability. The dynamics of vortices found in most of observed magnetic states seems to play a key role in triggering the magnetization reversal.