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Magnetization switching and domain-wall propagation behavior in edge-modulated ferromagnetic nanowire structures.

Burn, D.M. and Arac, E. and Atkinson, D. (2013) 'Magnetization switching and domain-wall propagation behavior in edge-modulated ferromagnetic nanowire structures.', Physical review B., 88 (10). p. 104422.

Abstract

The magnetization reversal processes in ferromagnetic nanowires with sinusoidally modulated edges were investigated as a function of modulation amplitude and wavelength. The reversal processes were studied in two regimes: nucleation controlled reversal and magnetization reversal mediated by domain-wall propagation. In the latter case, domain walls were introduced using both nucleation-pad structures and local pulsed-field injection techniques. The reversal behavior shows that competing effects govern the switching fields in these structures, giving a minimum as a function of modulation wavelength, showing promising results for improved control of domain-wall propagation behavior. The experimental results were interpreted with detailed micromagnetic simulations and an analytical model, based on the demagnetization effects of the modulation upon the spin structure of the wire. The analysis highlights consistent trends in the reversal behavior resulting from modulation, and, significantly, the switching behavior is found to be scalable in relation to the amplitude and wavelength.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1103/PhysRevB.88.104422
Publisher statement:Reprinted with permission from the American Physical Society: David M. Burn, Erhan Arac, and Del Atkinson, Physical Review B, 88, 104422, 2013. © 2013 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:No date available
Date deposited:18 June 2014
Date of first online publication:September 2013
Date first made open access:No date available

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