Journal Article

PreJuSER-62444

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of perpendicular magnetic fields on the domain structure of permalloy microsctructures grown on thin membranes

Dietrich, C.FZJ* ; Hertel, R.FZJ* ; Huber, M.FZJ* ; Weiss, D.FZJ* ; Schäfer, R.FZJ* ; Zweck, J.FZJ*

2008
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7787  doi:10.1103/PhysRevB.77.174427

Abstract: Unlike the broadly studied influence of the in-plane magnetic fields on magnetic domain structures in thin-film elements, not much is known to date, on the changes of the domain structure driven by external magnetic fields applied perpendicular to the plane. Using high-resolution transmission electron microscopy studies combined with micromagnetic modeling, we investigated the effect of static, strong perpendicular fields on square and disk-shaped mesoscopic permalloy elements with a vortex flux-closure magnetization structure. In the case of square elements, we discovered an unexpected, pronounced, and reversible bending of the 90 degrees domain walls, which increases with the field strength and changes direction when the field direction is reversed. By means of micromagnetic simulations and atomic force microscopy studies, we demonstrate that this effect is connected with the minute curvatures of the sample surface. The slight curvature arises from surface tensions in the membrane on which the microstructures are fabricated.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2008

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