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Controlling the stability of both the structure and velocity of domain walls in magnetic nanowires.

Brandão, J. and Atkinson, D. (2016) 'Controlling the stability of both the structure and velocity of domain walls in magnetic nanowires.', Applied physics letters., 109 (6). 062405.

Abstract

For magnetic nanowire devices, the precise control of both domain wall (DW) motion and pinning behaviour is essential for reliable functional performance. The domain wall velocity and wall structure are typically sensitive to the driving field or spin-polarized current, and the pinning behaviour depends on the walls’ structure and chirality, leading to variability in behaviour. Here, a systematic study combining experimental measurements and micromagnetic simulations of planar nanowires with small fixed-angle structural modulations on both edges was undertaken to study the domain wall reversal regime. A phase diagram for the reversal field as a function of modulation amplitude was obtained that shows that three DW reversal regime. A range of field and modulation amplitudes were identified in which stable DW reversal occurs, where the wall velocity is constant as a function of field and the wall structure is stable, which is well suited to applications.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1063/1.4960201
Publisher statement:© 2016 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Brandão, J. & Atkinson, D. (2016). Controlling the stability of both the structure and velocity of domain walls in magnetic nanowires. Applied Physics Letters 109(6): 062405 and may be found at https://doi.org/10.1063/1.4960201
Date accepted:21 June 2016
Date deposited:17 January 2018
Date of first online publication:10 August 2016
Date first made open access:17 January 2018

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