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

Ramu, M.; Goolaup, S.; Gan, W. L; Krishnia, S.; Lim, G. J. and Lew, W. S. (2017). Spin orbit torque induced asymmetric depinning of chiral Néel domain wall in Co/Ni heterostructures. Applied Physics Letters, 110(16), article no. 162402.

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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.

Item Type: Journal Item
Copyright Holders: 2017 The Authors
ISSN: 1077-3118
Project Funding Details:
Funded Project NameProject IDFunding Body
Competitive Research Programme (Non-volatile Magnetic Logic and Memory Integrated Circuit DevicesNRFCRP9-2011-01Singapore National Research Foundation, Prime Minister's Office
Industry-IHL Partnership ProgramNRF2015-IIP001-001Not Set
MOE-AcRF Tier 2 GrantMOE 2013-T2-2-017Not Set
RIE2020 AME-Programmatic GrantA1687b0033Not Set
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 59845
Depositing User: Vikram Goolaup
Date Deposited: 26 Mar 2019 16:10
Last Modified: 16 Apr 2019 01:28
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