Controlled domain wall injection into ferromagnetic nanowires from an optimized pad geometry

McGrouther, D. , McVitie, S., Chapman, J.N. and Gentils, A. (2007) Controlled domain wall injection into ferromagnetic nanowires from an optimized pad geometry. Applied Physics Letters, 91(2), 022506. (doi:10.1063/1.2753541)

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Publisher's URL: http://dx.doi.org/10.1063/1.2753541

Abstract

The authors present an improved geometry for a micron-scale pad for the injection of vortex domain walls (VDWs) into ferromagnetic nanowires. The pad supports a single vortex magnetization state, the chirality of which can be controlled simply by field saturation along a specific direction. We show, using Lorentz transmission electron microscopy, that utilization of such pads allows the chirality of VDWs injected into the attached wire to be predetermined. Furthermore, the pad vortex state is highly stable and survives repeated injection and depinning of VDWs from an asymmetric notch located some distance along the wire.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McGrouther, Dr Damien and McVitie, Professor Stephen and Chapman, Professor John
Authors: McGrouther, D., McVitie, S., Chapman, J.N., and Gentils, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Applied Physics Letters
ISSN:0003-6951
ISSN (Online):1077-3118
Published Online:12 July 2007

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
402831Spin@RT: Room Temperature SpintronicsJohn ChapmanEngineering & Physical Sciences Research Council (EPSRC)EP/D003199/1Science and Engineering College Senior Management