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Domain wall interactions at a cross-shaped vertex

O'Brien, L. O., Beguivin, A., Petit, D., Fernandez-Pacheco, A., Read, Daniel 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. 10.1098/rsta.2012.0089

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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: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: The Royal Society
ISSN: 1364-503X
Last Modified: 04 Jun 2017 04:53
URI: http://orca.cf.ac.uk/id/eprint/46147

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