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.

DOI: https://doi.org/10.1063/1.4980120

Abstract

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.

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About

• Item ORO ID
• 59845
• Item Type
• Journal Item
• ISSN
• 1077-3118
• Project Funding Details

• Funded Project Name	Project ID	Funding Body
  Competitive Research Programme (Non-volatile Magnetic Logic and Memory Integrated Circuit Devices	NRFCRP9-2011-01	Singapore National Research Foundation, Prime Minister's Office
  Industry-IHL Partnership Program	NRF2015-IIP001-001	Not Set
  MOE-AcRF Tier 2 Grant	MOE 2013-T2-2-017	Not Set
  RIE2020 AME-Programmatic Grant	A1687b0033	Not Set

• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2017 The Authors
• Depositing User
• Vikram Goolaup