Chirality-dependent domain wall pinning in a multinotched planar nanowire and chirality preservation using transverse magnetic fields

Eastwood, David S.; King, J. A.; Bogart, Lara K.; Cramman, Helen; Atkinson, D.

doi:10.1063/1.3525733

Cited by 13 publications

(8 citation statements)

References 22 publications

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“…We therefore expect the Oe field to have an influence on DW motion through the stabilization of the DW magnetization. In fact, it has been shown by Eastwood et al [26] that for Py nanostrips with similar width (390 nm) and thickness (10 nm) the TW magnetization can already be stabilized with a transverse field of the order of 5 mT. In previous measurements on trilayer Py/Cu/Co nanostrips, we observed high current-induced DW velocities for current densities corresponding to transverse Oersted fields of about 3-4 mT [27].…”

Section: Resultsmentioning

confidence: 66%

Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses

Ishaque

Nguyen

Rougemaille

et al. 2016

Journal of Magnetism and Magnetic Materials

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Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses, Journal of Magnetism and Magnetic Materials, http://dx. AbstractUsing magnetic force microscopy and micromagnetic simulations, we studied the effect of Oersted magnetic fields on transverse magnetic domain walls in Fe 20 Ni 80 /Ir bilayer nanostrips. Applying nanosecond current pulses with a current density of around 2 × 10 12 A/m 2 , the magnetization direction of a transverse domain wall in the Fe 20 Ni 80 -layer could be switched reversibly and reproducibly. This suggests that in bi-and trilayer strips the Oersted field stabilizes the transverse wall magnetization direction during current-induced domain wall motion and prevents domain wall transformations.

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Section: Resultsmentioning

confidence: 66%

Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses

Ishaque

Nguyen

Rougemaille

et al. 2016

Journal of Magnetism and Magnetic Materials

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“…DW interactions with different geometrical structures has been widely explored e.g. refs 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 .…”

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confidence: 99%

Effective pinning energy landscape perturbations for propagating magnetic domain walls

Burn

Atkinson

2016

Sci Rep

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The interaction between a magnetic domain wall and a pinning site is explored in a planar nanowire using micromagnetics to reveal perturbations of the pinning energetics for propagating domain walls. Numerical simulations in the high damping ’quasi-static’ and low damping ’dynamic’ regimes are compared and show clear differences in de-pinning fields, indicating that dynamical micromagnetic models, which incorporate precessionally limited magnetization processes, are needed to understand domain wall pinning. Differences in the micromagnetic domain wall structure strongly influence the pinning and show periodic behaviour with increasing applied field associated with Walker breakdown. In the propagating regime pinning is complicated.

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“…The transverse DW with a core magnetization parallel to the applied transverse field (the same chirality, which was set by the initial field pulse) is preferred, 19,25 i.e., this chirality occurs with a twofold increased probability as compared to the former case. As a consequence, the pinning probability increases to 50%, which means that the transverse DW with the correct chirality and a vortex wall occur each with a probability of 50%.…”

Section: (B) Tt Right)mentioning

confidence: 99%

“…[18][19][20][21][22][23] However, the impact of such a field configuration on the DW pinning process was treated for small field regions only. 24,25 The aim of this study is to close this gap by investigating the influence of a transverse field on the DW pinning for a large transverse field region. In a first step, we will cover the influence of a transverse field on weak pinning sites in general and in the second part, we analyze the pinning process at a strong pinning site.…”

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confidence: 99%

Influence of transverse fields on domain wall pinning in ferromagnetic nanostripes

Glathe

Hübner

Mattheis

et al. 2012

Journal of Applied Physics

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We report an experimental study dealing with the influence of in-plane transverse fields on the domain wall (DW) pinning in ferromagnetic nanostripes. We analyzed the pinning probability and depinning fields for several fabrication induced pinning sites. For all measurements reported here, the depinning field decreases with increasing transverse field independently from the actual domain wall type and the shape of the pinning site. The pinning probability decreases with increasing transverse fields for weak pinning sites. Stronger pinning sites can be active for large field ranges and show a complex dependence of the pinning probability on the applied transverse field. The occurrence of different domain wall types as well as the influence of a transverse field on the domain wall dynamics can explain this behavior. V C 2012 American Institute of Physics.

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Chirality-dependent domain wall pinning in a multinotched planar nanowire and chirality preservation using transverse magnetic fields

Cited by 13 publications

References 22 publications

Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses

Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses

Effective pinning energy landscape perturbations for propagating magnetic domain walls

Influence of transverse fields on domain wall pinning in ferromagnetic nanostripes

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