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      Deterministic Spin-Orbit Torque Induced Magnetization Reversal In Pt/[Co/Ni] n /Co/Ta Multilayer Hall Bars

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      Deterministic Spin-Orbit Torque Induced Magnetization Reversal In Pt[CoNi] n CoTa Multilayer Hall Bars.pdf (1.787Mb)
      Author
      Li, Sihua
      Goolaup, Sarjoosing
      Kwon, Jaesuk
      Luo, Feilong
      Gan, Weiliang
      Lew, Wen Siang
      Date of Issue
      2017
      School
      School of Physical and Mathematical Sciences
      Version
      Published version
      Abstract
      Spin-orbit torque (SOT) induced by electric current has attracted extensive attention as an efficient method of controlling the magnetization in nanomagnetic structures. SOT-induced magnetization reversal is usually achieved with the aid of an in-plane bias magnetic field. In this paper, we show that by selecting a film stack with weak out-of-plane magnetic anisotropy, field-free SOT-induced switching can be achieved in micron sized multilayers. Using direct current, deterministic bipolar magnetization reversal is obtained in Pt/[Co/Ni]2/Co/Ta structures. Kerr imaging reveals that the SOT-induced magnetization switching process is completed via the nucleation of reverse domain and propagation of domain wall in the system.
      Subject
      Electrical and electronic engineering
      Spintronics
      Type
      Journal Article
      Series/Journal Title
      Scientific Reports
      Rights
      © 2017 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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      http://dx.doi.org/10.1038/s41598-017-01079-7
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