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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:324

Article

Delalande, M.¹  de Vries, J.¹  Abelmann, L.¹  Lodder, J. C.¹ 

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

关键词: Magnetic data storage;    Domain nucleation;    Anomalous Hall Effect;   

DOI  :  10.1016/j.jmmm.2011.09.037

来源: Elsevier

【 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.

【 授权许可】

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