MFM study of magnetic vortex cores in circular permalloy dots: behavior in external field

被引：155

作者：

Okuno, T ^{[1
]}

Shigeto, K

Ono, T

Mibu, K

Shinjo, T

机构：

[1] Kyoto Univ, Inst Chem Res, Uji 6110011, Japan

[2] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 240卷 / 1-3期

基金：

日本学术振兴会;

关键词：

permalloy circular dot; magnetization vortex structure; MFM; switching fields; magnetization reversal;

D O I：

10.1016/S0304-8853(01)00708-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In a circular dot of permalloy with an appropriate size, a vortex structure with perpendicular (turned-up) magnetization at the core is realized. The existence of the perpendicular magnetization spot has been confirmed and the direction of the magnetization, up or down, has been determined by magnetic force microscopy (MFM) for permalloy dots with the diameter of 0.1-1 mum. The switching field of turned-up magnetization is determined by applying external fields perpendicularly and in tilted directions to the plane. By comparing the MFM results and the magnetization curves measured by a SQUID magnetometer, the switching process of turned-up magnetization is argued. (C)2002 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 6

页数：6

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