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Influence of geometry on domain wall dynamics in permalloy nanodevices.

Corte-Leon, H; Beguivin, A*; Krzysteczko, P*; Schmacher, H W*; Manzin, A*; Cowburn, R P*; Antonov, V*; Kazakova, O (2015) Influence of geometry on domain wall dynamics in permalloy nanodevices. IEEE Trans. Magn., 51 (1). 4001304

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Abstract

We perform magnetoresistance (MR) and magneto-optical Kerr effect (MOKE) measurements to experimentally track magnetic domain wall (DW) pinning/depinning process in L-shaped Permalloy (Py) nanostructures of different geometries (i.e. straight/round corner and absence/presence of circular disks) with widths in the range 75 - 400 nm. With MR and MOKE measurements being in a good quantitative agreement, we demonstrate that the field interval between pinning and depinning events increases with reduction of the nanowire width. Moreover, the DW pinning/depinning behavior is geometry dependent, where round corners break the symmetry in device orientation towards the field. The interpretation of experimental results is supported by micromagnetic simulations.

Item Type: Article
Subjects: Quantum Phenomena
Quantum Phenomena > Nanophysics
Identification number/DOI: 10.1109/TMAG.2014.2356617
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6528

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