Current induced domain wall motion in antiferromagnetically coupled (Co70Fe30/Pd) multilayer nanowires

Current induced domain wall motion in antiferromagnetically coupled (Co70Fe30/Pd) multilayer nanowires

We investigate the current induced domain wall (DW) motion in the ultrathin CoFe/Pd multilayer based synthetically antiferromagnetic (SAF) structure nanowires by anomalous Hall effect measurement. The threshold current density (Jth) for the DW displacement decreases and the DW velocity (v) increases...

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Bibliographic Details
Main Authors: Meng, Zhaoliang, He, Shikun, Huang, Lisen, Qiu, Jinjun, Zhou, Tiejun, Panagopoulos, Christos, Han, Guchang, Teo, Kie-Leong
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2017
Subjects:
Multilayers
Nanowires
Online Access:https://hdl.handle.net/10356/83932
http://hdl.handle.net/10220/42882
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Institution: Nanyang Technological University
Language: English
Description
Summary:We investigate the current induced domain wall (DW) motion in the ultrathin CoFe/Pd multilayer based synthetically antiferromagnetic (SAF) structure nanowires by anomalous Hall effect measurement. The threshold current density (Jth) for the DW displacement decreases and the DW velocity (v) increases accordingly with the exchange coupling Jex between the top and bottom ferromagnetic CoFe/Pd multilayers. The lowest Jth = 9.3 x 10^10 A/m2 and a maximum v = 150 m/s with J = 1.5 x 10^12 A/m2 are achieved due to the exchange coupling torque (ECT) generated in the SAF structure. The strength of ECT is dependent on both of Jex and the strong spin-orbit torque mainly generated by Ta layer.

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