Domain wall pinning and potential landscapes created by constrictions and protrusions in ferromagnetic nanowires

Petit, Dorothee, Jausovec, Ana-Vanessa, Read, Daniel ORCID: https://orcid.org/0000-0002-4178-4986 and Cowburn, Russell P. 2008. Domain wall pinning and potential landscapes created by constrictions and protrusions in ferromagnetic nanowires. Journal of Applied Physics 103 (11) , 114307. 10.1063/1.2936981

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Abstract

The potential experienced by transverse domain walls (TDWs) in the vicinity of asymmetric constrictions or protrusions in thin Permalloy nanowires is probed using spatially resolved magneto-optical Kerr effect measurements. Both types of traps are found to act as pinning centers for DWs. The strength of pinning is found to depend on the trap type as well as on the chirality of the incoming DW; both types of traps are seen to act either as potential wells or potential barriers, also depending on the chirality of the DW. Micromagnetic simulations have been performed that are in good qualitative agreement with the experimental results.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Uncontrolled Keywords:	chirality, ferromagnetic materials, Kerr magneto-optical effect, magnetic domain walls, nanowires, Permalloy
Additional Information:	6 pp.
Publisher:	American Institute of Physics
ISSN:	0021-8979
Last Modified:	02 May 2023 21:36
URI:	https://orca.cardiff.ac.uk/id/eprint/17417

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