Domain wall interactions at a cross-shaped vertex

O'Brien, L., Beguivin, A., Petit, D., Fernandez-Pacheco, A. , Read, D. and Cowburn, R.P. (2012) Domain wall interactions at a cross-shaped vertex. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 370(1981), pp. 5794-5805. (doi: 10.1098/rsta.2012.0089) (PMID:23166381)

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Abstract

The interaction of two domain walls (DWs) at a cross-shaped vertex fabricated from two ferromagnetic nanowires has been experimentally investigated. Both magnetostatically repulsive and attractive interactions have been probed. It is found that in the repulsive case, a passing DW may directly induce the depinning of another that is already pinned at a vertex. This effect can be qualitatively described by considering only simple, magnetostatic-charge-based arguments. In the attractive case, however, asymmetric pinning is found, with complete suppression of depinning possible. This observed effect is contrary to simple charge-based arguments and highlights the need for full micromagnetic characterization of the DW interactions in more complex systems.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fernandez-Pacheco, Dr Amalio
Authors: O'Brien, L., Beguivin, A., Petit, D., Fernandez-Pacheco, A., Read, D., and Cowburn, R.P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Publisher:Royal Society
ISSN:1364-503X
ISSN (Online):1471-2962

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