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Measuring Domain Wall Fidelity Lengths Using a Chirality Filter

Lewis, E. R., Petit, D., Jausovec, A. V., O'Brien, L., Read, Daniel ORCID:, Zeng, H. T. and Cowburn, R. P. 2009. Measuring Domain Wall Fidelity Lengths Using a Chirality Filter. Physical Review Letters 102 (5) , 057209. 10.1103/PhysRevLett.102.057209

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The motion of transverse domain walls (DWs) in thin Permalloy nanowires has been studied by locally detecting the chirality of the moving DW, using a cross-shaped trap acting as a chirality filter. We find that structural changes of the DW occur over a characteristic minimum distance: the “DW fidelity length.” The measured field dependence of the fidelity length is in good qualitative agreement with a 1D analytical model and with published results of numerical simulations and experiments. We also demonstrate extension of the fidelity length to meter length scales using a series of filters.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0031-9007
Last Modified: 17 Oct 2022 10:10

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