Current-Excited Magnetization Dynamics in Narrow Ferromagnetic Wires
Current-Excited Magnetization Dynamics in Narrow Ferromagnetic Wires
复制标题
窄铁磁线中的电流激励磁化动力学
DOI：
10.1143/jjap.45.l683
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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
利用Lorentz显微镜，结合同步输运测量结果，研究了铁磁坡莫合金细丝的电流激发磁化动力学。给出了作为外加电流密度函数的磁化强度的详细结构演化。随着电流密度的增加，居里温度以下出现局部结构形变、双向位移和磁化反转。我们讨论了电流激励磁化动力学观测特征的可能机制。
We investigate the current-excited magnetization dynamics in a narrow ferromagnetic Permalloy wire by means of Lorentz microscopy, together with the results of simultaneous transport measurements. A detailed structural evolution of the magnetization is presented as a function of the applied current density. Local structural deformation, bidirectional displacement, and magnetization reversal are found below the Curie temperature with increasing the current density. We discuss probable mechanisms of observed features of the current-excited magnetization dynamics.