Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire
Magnetic domain wall positional manipulation is usually through the introduction of potential trap. In this work, we show that the presence of interfacial Dzyaloshinkii–Moriya interaction leads to a different static depinning field for Néel domain walls with the same handedness in a notched magnetic...
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sg-ntu-dr.10356-859312020-03-07T12:37:05Z Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire Teoh, Han Kheng Goolaup, Sarjoosing Lew, Wen Siang School of Physical and Mathematical Sciences Dzyaloshinskii–Moriya Interaction Micromagnetism Magnetic domain wall positional manipulation is usually through the introduction of potential trap. In this work, we show that the presence of interfacial Dzyaloshinkii–Moriya interaction leads to a different static depinning field for Néel domain walls with the same handedness in a notched magnetic nanowire. The difference in static depinning field is due to the Néel domain wall spin orientation. The spin orientation leads to different torques being exerted on the localized magnetic moments. This inherently imposes a spin orientation dependent diode-like behavior for domain walls in a notched nanowire. An equation which relates the difference in static depinning field to the notch geometry is derived. Micromagnetic simulation with varying damping constant reveals the influence of damping constant on the strength of depinning anomaly. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) 2017-10-16T08:08:59Z 2019-12-06T16:12:58Z 2017-10-16T08:08:59Z 2019-12-06T16:12:58Z 2016 Journal Article Teoh, H. K., Goolaup, S., & Lew, W. S. (2016). Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire. Journal of Physics D: Applied Physics, 50(1), 015004-. 0022-3727 https://hdl.handle.net/10356/85931 http://hdl.handle.net/10220/43903 10.1088/1361-6463/50/1/015004 en Journal of Physics D: Applied Physics © 2016 IOP Publishing Ltd. |
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Dzyaloshinskii–Moriya Interaction Micromagnetism Teoh, Han Kheng Goolaup, Sarjoosing Lew, Wen Siang Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
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Magnetic domain wall positional manipulation is usually through the introduction of potential trap. In this work, we show that the presence of interfacial Dzyaloshinkii–Moriya interaction leads to a different static depinning field for Néel domain walls with the same handedness in a notched magnetic nanowire. The difference in static depinning field is due to the Néel domain wall spin orientation. The spin orientation leads to different torques being exerted on the localized magnetic moments. This inherently imposes a spin orientation dependent diode-like behavior for domain walls in a notched nanowire. An equation which relates the difference in static depinning field to the notch geometry is derived. Micromagnetic simulation with varying damping constant reveals the influence of damping constant on the strength of depinning anomaly. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Teoh, Han Kheng Goolaup, Sarjoosing Lew, Wen Siang |
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Teoh, Han Kheng Goolaup, Sarjoosing Lew, Wen Siang |
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Teoh, Han Kheng |
title |
Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
title_short |
Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
title_full |
Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
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Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
title_full_unstemmed |
Dzyaloshinskii–Moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
title_sort |
dzyaloshinskii–moriya interaction induced domain wall depinning anomaly in ferromagnetic nanowire |
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2017 |
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https://hdl.handle.net/10356/85931 http://hdl.handle.net/10220/43903 |
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