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DOI: 10.1016/S0304-8853(01)00744-2
PII: S0304-8853(01)00744-2
Copyright © 2001 Published by Elsevier Science B.V. All rights reserved.

Low frequency magnetic noise in epitaxial antiferromagnetically coupled Fe/Cr multilayers

V. V. Pryadun^a, R. Guerrero^a, F. G. Aliev^{, , a}, R. Villar^a, A. Volodin^b, C. Van Haesendonck^b and I. Vavra<sup>c

a</sup> Dpto. de Fisica de la Materia Condensada, Instituto Ciencia de Materiales "Nicolas Cabrera", C-III, Universidad Autonoma de Madrid, 28049 Madrid, Spain
^b Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
^c Institute of Electrical Engineering, Slovak Academy of Sciences, 84239 Bratislava, Slovakia

Available online 17 October 2001.

Abstract

For antiferromagnetically coupled epitaxial [Fe/Cr(001)]₁₀ multilayers we detected a strong enhancement of the magnetism-related electrical noise in the vicinity of the orientation transition between the easy and hard axes. Our measurements are performed at different temperatures and we also identified the noise caused by depinning of domain walls (DWs). We are able to detect and follow in real time the motion of rather extended (of the order of 100 m) DWs by comparing the magnetic noise in the presence and absence of a DC transport current, respectively. The presence of large and small (<1 m) DWs is confirmed by magnetic force microscopy images obtained at room temperature.

Author Keywords: Multilayers; Domain wall; Stray field; Magnetic imaging

Article Outline

References

References

1. H.T. Hardner et al.. Phys. Rev. B 48 (1993), p. 468.

2. R. Schad et al.. Appl. Phys. Lett. 64 (1994), p. 3500. Abstract-INSPEC |  $Order Document | Full-text via CrossRef

Corresponding author. Tel.: +341-397-4756; fax: +341-397-3961; email: farkhad.aliev@uam.es
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