Field evolution of magnetic vortex state in ferromagnetic disks

被引：184

作者：

Guslienko, KY

Novosad, V ^{[1
]}

Otani, Y

Shima, H

Fukamichi, K

机构：

[1] Korea Adv Inst Sci & Technol, Sch Phys, Seoul 130012, South Korea

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

APPLIED PHYSICS LETTERS | 2001年 / 78卷 / 24期

关键词：

D O I：

10.1063/1.1377850

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The evolution of a magnetic "vortex" state in submicron ferromagnetic disks has been studied as functions of disk diameter and thickness. The vortex core displacement in the applied magnetic field was calculated by minimizing the total magnetic energy consisting of the magnetostatic, exchange, and Zeeman energies. A simple analytical expression fur the initial magnetic susceptibility is deduced. The initial susceptibility increases with increasing disk diameter and decreasing thickness. The calculations agree well with the experimental data obtained fur the 60 nm thick permalloy disk arrays with a variable diameter from 0.2 to 0.8 mum. (C) 2001 American Institute of Physics.

引用

页码：3848 / 3850

页数：3

共 14 条

[1] UPPER BOUND TO A SINGLE-DOMAIN BEHAVIOR OF A FERROMAGNETIC CYLINDER [J].