Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures

Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures

In this letter, we report on distinct depinning of a chiral Néel domain wall (DW) driven by spin-orbit torque (SOT) in Co/Ni nanowires with symmetric potential barriers. In these structures, DW propagation was shown to be in the opposite direction to the electron flow as evidenced from current assis...

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Main Authors: Ramu, Maddu, Goolaup, Sarjoosing, Gan, Wei Liang, Krishnia, Sachin, Lim, Gerard Joseph, Lew, Wen Siang
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2017
Subjects:
Dielectrophoresis
Chiral symmetries
Online Access:https://hdl.handle.net/10356/83356
http://hdl.handle.net/10220/42562
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-833562023-02-28T19:32:42Z Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures Ramu, Maddu Goolaup, Sarjoosing Gan, Wei Liang Krishnia, Sachin Lim, Gerard Joseph Lew, Wen Siang School of Physical and Mathematical Sciences Dielectrophoresis Chiral symmetries In this letter, we report on distinct depinning of a chiral Néel domain wall (DW) driven by spin-orbit torque (SOT) in Co/Ni nanowires with symmetric potential barriers. In these structures, DW propagation was shown to be in the opposite direction to the electron flow as evidenced from current assisted DW depinning measurements. A transition from field dominated DW depinning to SOT dominated DW depinning was observed as the bias current was increased. For SOT dominated DW depinning, the Up-Down DW exhibits a larger depinning field as compared to the Down-Up DW. This is attributed to the interplay between the SOT and Dzyaloshinskii-Moriya interaction in the structure. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2017-06-02T07:59:50Z 2019-12-06T15:20:41Z 2017-06-02T07:59:50Z 2019-12-06T15:20:41Z 2017 Journal Article Ramu, M., Goolaup, S., Gan, W. L., Krishnia, S., Lim, G. J., & Lew, W. S. (2017). Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures. Applied Physics Letters, 110(16), 162402-. 0003-6951 https://hdl.handle.net/10356/83356 http://hdl.handle.net/10220/42562 10.1063/1.4980120 en Applied Physics Letters © 2017 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: [http://dx.doi.org/10.1063/1.4980120]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Dielectrophoresis
Chiral symmetries
spellingShingle Dielectrophoresis
Chiral symmetries
Ramu, Maddu
Goolaup, Sarjoosing
Gan, Wei Liang
Krishnia, Sachin
Lim, Gerard Joseph
Lew, Wen Siang
Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures
description In this letter, we report on distinct depinning of a chiral Néel domain wall (DW) driven by spin-orbit torque (SOT) in Co/Ni nanowires with symmetric potential barriers. In these structures, DW propagation was shown to be in the opposite direction to the electron flow as evidenced from current assisted DW depinning measurements. A transition from field dominated DW depinning to SOT dominated DW depinning was observed as the bias current was increased. For SOT dominated DW depinning, the Up-Down DW exhibits a larger depinning field as compared to the Down-Up DW. This is attributed to the interplay between the SOT and Dzyaloshinskii-Moriya interaction in the structure.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Ramu, Maddu
Goolaup, Sarjoosing
Gan, Wei Liang
Krishnia, Sachin
Lim, Gerard Joseph
Lew, Wen Siang
format Article
author Ramu, Maddu
Goolaup, Sarjoosing
Gan, Wei Liang
Krishnia, Sachin
Lim, Gerard Joseph
Lew, Wen Siang
author_sort Ramu, Maddu
title Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures
title_short Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures
title_full Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures
title_fullStr Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures
title_full_unstemmed Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures
title_sort spin orbit torque induced asymmetric depinning of chiral néel domain wall in co/ni heterostructures
publishDate 2017
url https://hdl.handle.net/10356/83356
http://hdl.handle.net/10220/42562
_version_ 1759853694627610624

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