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

Brandão, J.; Atkinson, D.

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


Authors

J. Brandão



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.

Citation

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), Article 062405. https://doi.org/10.1063/1.4960201

Journal Article Type Article
Acceptance Date Jun 21, 2016
Online Publication Date Aug 10, 2016
Publication Date Aug 10, 2016
Deposit Date Jun 21, 2017
Publicly Available Date Jan 17, 2018
Journal Applied Physics Letters
Print ISSN 0003-6951
Electronic ISSN 1077-3118
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 109
Issue 6
Article Number 062405
DOI https://doi.org/10.1063/1.4960201

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Copyright 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





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