Micromagnetic Simulation of Damped Oscillatory Behavior of Domain Wall Propagation in Sinusoidal Ferromagnetic Nanowire

Piao, Hong‐Guang; Shim, Joongpyo; Djuhana, Dede; Lee, S.-H.; Jun, Su; Heo, C.-M.; Oh, Suhk Kun; Sui, Yu; Kim, D.-H.

doi:10.1109/tmag.2009.2032093

Cited by 4 publications

(3 citation statements)

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“…Previous studies with periodic rectangular anti-notches 15 and triangular or sinusoidal edge modifications 20 show modified DW dynamics, 21 but critically the linkage between the Walker breakdown periodicity and wire structuring wavelength has not been explored and the mechanism for suppressing Walker breakdown with periodic modulation has not been elucidated. This paper presents a detailed systematic micromagnetic investigation 22,23 of the dynamic behavior of DWs and shows how Walker breakdown suppression can be achieved by careful manipulation of nanowire edge modulation parameters.…”

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confidence: 99%

“…This field depends on the structural wavelength and shows a 1/k dependence on the modulation, indicated by the solid line in Figure 2(b). An increase in de-pinning field such as this can result from a reduction of axial anisotropy due to wire modulation 21 or increasing edge roughness. 17 Above the de-pinning field, the DW dynamics depend strongly upon the modulation wavelength.…”

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Suppression of Walker breakdown in magnetic domain wall propagation through structural control of spin wave emission

Burn

Atkinson

2013

Applied Physics Letters

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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Suppression of Walker breakdown in magnetic domain wall propagation through structural control of spin wave emission

Burn

Atkinson

2013

Applied Physics Letters

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“…23 Since then, various geometries have given promising results both experimentally 24 and theoretically. [25][26][27][28] These periodic geometrical modifications can fundamentally modify the magnetization process showing improved DW dynamics and control over the depinning field for DWs in the nanowire. 25 In DW-based devices, both improved DW dynamics and control over the pinning and depinning of DWs is desirable.…”

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

2013

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Publisher's copyright statement:Reprinted with permission from the American Physical Society: David M. Burn, Erhan Arac, and Del Atkinson, Physical Review B, 88, 104422, 2013. c 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, modied, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. 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.

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Suppression of Walker breakdown in gapped magnetic nanowires

Kim

Park

et al. 2018

Journal of Applied Physics

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We report a numerical study on the efficient and controllable suppression of the Walker breakdown along nanowires by positioning nanogaps with periodicity matching to that of transformational spin structure of the magnetic domain wall. While the Walker breakdown is suppressed, the transverse spin structure is found to be stably maintained without the formation of antivortex core throughout the propagation, shedding a light in faster spintronic devices based on the domain wall motion.

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Micromagnetic Simulation of Damped Oscillatory Behavior of Domain Wall Propagation in Sinusoidal Ferromagnetic Nanowire

Cited by 4 publications

References 15 publications

Suppression of Walker breakdown in magnetic domain wall propagation through structural control of spin wave emission

Suppression of Walker breakdown in magnetic domain wall propagation through structural control of spin wave emission

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

Suppression of Walker breakdown in gapped magnetic nanowires

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