Magnetic vortex core dynamics in cylindrical ferromagnetic dots

被引：220
|
作者：
Guslienko, KY
Han, XF
Keavney, DJ
Divan, R
Bader, SD
机构：
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.96.067205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report direct imaging by means of x-ray photoemission electron microscopy of the dynamics of magnetic vortices confined in micron-sized circular permalloy dots that are 30 nm thick. The vortex core positions oscillate on a 10 ns time scale in a self-induced magnetostatic potential well after the in-plane magnetic field is turned off. The measured oscillation frequencies as a function of the aspect ratio of the dots are in agreement with theoretical calculations presented for the same geometry.
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页数：4
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