Disorder-independent control of magnetic monopole defect population in artificial spin-ice honeycombs

Ladak, Sam ORCID: https://orcid.org/0000-0002-0275-0927, Walton, S. K., Zeissler, K., Tyliszczak, T., Read, Daniel ORCID: https://orcid.org/0000-0002-4178-4986, Branford, W. R. and Cohen, L. F. 2012. Disorder-independent control of magnetic monopole defect population in artificial spin-ice honeycombs. New Journal of Physics 14 (4) , 045010. 10.1088/1367-2630/14/4/045010

Full text not available from this repository.

Abstract

Breakdown of the ice rule in artificial spin-ice nanostructures results in magnetic monopole defects with zero magnetic moment. Such defects exist during the magnetic switching process in some nanostructures and yet are absent in other apparently similar arrays having the same geometry and made from the same material components. One explanation proposed for this discrepancy is that it is due to the variation of disorder across samples, with monopole defect formation occuring only in highly disordered samples. Although disorder can indeed play a role in the determination of monopole density, in this paper we show, by experiment and simulation, that in samples of similar, low disorder, the factor controlling the nature of magnetic switching is whether the domain walls are in the transverse wall regime or in the vortex wall regime. This work illustrates that monopole formation can be controlled by intrinsic micro-magnetic behaviour as well as by extrinsic quenched disorder.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	IOP
ISSN:	1367-2630
Last Modified:	20 Oct 2022 08:26
URI:	https://orca.cardiff.ac.uk/id/eprint/28348

Citation Data

Cited 22 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item