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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Bibliographic Details
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
Description
Summary: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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