Current-induced multiple domain wall motion modulated by magnetic pinning in zigzag shaped nanowires

Zhou, Xiaochao; Huang, Zhaocong; Zhang, Wen; Yin, Yuli; Dürrenfeld, Philipp; Dong, Shuai; Zhai, Ya

doi:10.1063/1.4975129

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…Just as disorder can improve the domain wall mobil ity above the Walker breakdown, strategically chosen notch locations can also increase the domain wall velocities [162]. Alternatively, zig-zag wires, in which the domain walls can pin to the edges, have been proposed [163]. In later ver sions, the racetrack memory concept was extended to PMA materials [164] (figure 18, which can accommodate much smaller domain (walls) (b)) and versions which exploited the Dzyaloshinskii-Moriya interaction [157,165] (figure 18(c)), or even antiferromagnetically coupled nanostrips [166], elimi nating stray fields, and thus coupling between domain walls or adjacent nanostrips, (figure 18(d)) to further improve its per formance.…”

Section: Nonzero Temperaturementioning

confidence: 99%

Fast micromagnetic simulations on GPU—recent advances made with $\mathsf{mumax}^3$

Leliaert

Dvornik

Mulkers

et al. 2018

J. Phys. D: Appl. Phys.

145

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In the last twenty years, numerical modeling has become an indispensable part of magnetism research. It has become a standard tool for both the exploration of new systems and for the interpretation of experimental data. In the last five years, the capabilities of micromagnetic modeling have dramatically increased due to the deployment of graphical processing units (GPU), which have sped up calculations to a factor of 200. This has enabled many studies which were previously unfeasible. In this topical review, we give an overview of this modeling approach and show how it has contributed to the forefront of current magnetism research.

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Section: Nonzero Temperaturementioning

confidence: 99%

Fast micromagnetic simulations on GPU—recent advances made with $\mathsf{mumax}^3$

Leliaert

Dvornik

Mulkers

et al. 2018

J. Phys. D: Appl. Phys.

145

View full text Add to dashboard Cite

show abstract

“…The control of magnetic domain walls (DWs) is a problem of great current interest for the nanomagnetics research community. The development of novel devices, such as racetrack memories [1,2,3] or domain wall logic based systems, [4,5,6,7] is based on the creation and propagation of DWs. New advances will only come through the fundamental understanding of magnetic DW dynamics in restricted geometries, which requires a deep insight into complex 2D interfaces.…”

Section: Introductionmentioning

confidence: 99%

2D magnetic domain wall ratchet: The limit of submicrometric holes

et al. 2018

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The study of ratchet and crossed-ratchet effects in magnetic domain wall motion through 2D arrays of asymmetric holes is extended in this article to the submicrometric limit in hole size (small size regime). Therefore, the gap has been closed between the 2D ratchets in the range of tens-of-micrometers (large size regime) and the small size regime 1D ratchets based on nanowires. The combination of Kerr microscopy, X-Ray PhotoEmission Electron Microscopy and micromagnetic simulations has allowed a full magnetic characterisation of both the domain wall (DW) propagation process over the whole array and the local DW morphology and pinning at the holes. It is found that the 2D small size limit is driven by the interplay between DW elasticity and half vortex propagation along hole edges: as hole size becomes comparable to DW width, flat DW propagation modes are favoured over kinked DW propagation due to an enhancement of DW stiffness, and pinned DW segments adopt asymmetric configurations related with Néel DW chirality. Nevertheless, both ratchet and crossed-ratchet effects have been experimentally found, and we propose a new ratchet/ inverted-ratchet effect in the submicrometric range driven by magnetic fields and electrical currents respectively.

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Current-induced multiple domain wall motion modulated by magnetic pinning in zigzag shaped nanowires

Cited by 2 publications

References 23 publications

Fast micromagnetic simulations on GPU—recent advances made with $\mathsf{mumax}^3$

Fast micromagnetic simulations on GPU—recent advances made with $\mathsf{mumax}^3$

2D magnetic domain wall ratchet: The limit of submicrometric holes

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