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The non-random walk of chiral magnetic charge carriers in artificial spin ice

Zeissler, K., Walton, S. K., Ladak, Sam, Read, Daniel, Tyliszczak, T., Cohen, L. F. and Branford, W. R. 2013. The non-random walk of chiral magnetic charge carriers in artificial spin ice. Scientific Reports 3 , 1252. 10.1038/srep01252

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Abstract

The flow of magnetic charge carriers (dubbed magnetic monopoles) through frustrated spin ice lattices, governed simply by Coulombic forces, represents a new direction in electromagnetism. Artificial spin ice nanoarrays realise this effect at room temperature, where the magnetic charge is carried by domain walls. Control of domain wall path is one important element of utilizing this new medium. By imaging the transit of domain walls across different connected 2D honeycomb structures we contribute an important aspect which will enable that control to be realized. Although apparently equivalent paths are presented to a domain wall as it approaches a Y-shaped vertex from a bar parallel to the field, we observe a stark non-random path distribution, which we attribute to the chirality of the magnetic charges. These observations are supported by detailed statistical modelling and micromagnetic simulations. The identification of chiral control to magnetic charge path selectivity invites analogy with spintronics.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Nature Publishing Group
ISSN: 2045-2322
Last Modified: 04 Jun 2017 04:43
URI: http://orca.cf.ac.uk/id/eprint/43615

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