Low-frequency vortex dynamic susceptibility and relaxation in mesoscopic ferromagnetic dots

被引：89
作者：
Guslienko, K. Yu. [1 ]
机构：
[1] Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 02期
关键词：
D O I：
10.1063/1.2221904
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Vortex dynamics in a restricted geometry is considered for a magnetic system consisting of ferromagnetic cylindrical dots. To describe the vortex dynamic susceptibility and relaxation the equation of motion for the vortex center position is applied. The dependencies of the vortex dynamic susceptibility and resonance linewidth on geometrical parameters are calculated. A method of extracting damping parameter from the vortex low-frequency resonance peaks is proposed and applied for interpretation of resonance data on FeNi circular dots. (c) 2006 American Institute of Physics.
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