Measurement of the nucleation and domain depinning field in a single Co/Pt multilayer dot by Anomalous Hall effect

被引：17

作者：

Delalande, M. ^{[1
]}

de Vries, J. ^{[1
]}

Abelmann, L. ^{[1
]}

Lodder, J. C. ^{[1
]}

机构：

[1] Univ Twente, MESA Res Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 07期

关键词：

Magnetic data storage; Domain nucleation; Anomalous Hall Effect;

D O I：

10.1016/j.jmmm.2011.09.037

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co/Pt multilayer dots with perpendicular anisotropy and with diameters of 250 and 350 nm were fabricated on top of a Hall cross configuration. The angular dependence of the magnetic reversal of the individual dot was investigated by Anomalous Hall effect measurements. At near in-plane angles (85 degrees with the magnetic easy axis) the dot switches partially into a stable two-domain state. This allows for separate analysis of the angular dependence of both the field required for nucleation of a reversed domain, and the field required for depinning of the domain wall. The angular dependence of the depinning field fits accurately to a 1/cos(theta) behavior, whereas the angular dependence of the nucleation field shows a minimum close to 45 degrees. The latter dependency can be accurately fitted to the modified Kondorsky model proposed by Schumacher [1]. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1277 / 1280

页数：4

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