Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-5209
Authors: | Zhao, Xiaoxuan Liu, Yang Zhu, Daoqian Sall, Mamour Zhang, Xueying Ma, Helin Langer, Jürgen Ocker, Berthold Jaiswal, Samridh Jakob, Gerhard Kläui, Mathias Zhao, Weisheng Ravelosona, Dafiné |
Title: | Spin-orbit torque driven multi-level switching in He+ irradiated W-CoFeB-MgO Hall bars with perpendicular anisotropy |
Online publication date: | 22-Oct-2020 |
Year of first publication: | 2020 |
Language: | english |
Abstract: | We have investigated the spin-orbit torque-driven magnetization switching in W/CoFeB/MgO Hall bars with perpendicular magnetic anisotropy. He+ ion irradiation through a mask has been used to reduce locally the effective perpendicular anisotropy at a Hall cross. Anomalous Hall effect measurements combined with Kerr microscopy indicate that the switching process is dominated by domain wall (DW) nucleation in the irradiated region followed by rapid domain propagation at a current density as low as 0.8 MA/cm(2) with an assisting in-plane magnetic field. Thanks to the implemented strong pinning of the DW at the transition between the irradiated and the non-irradiated region, an intermediate Hall resistance state is induced, which is further verified by finite element simulations. Such a method to control electrically multi-level resistances using He+ ion irradiation shows great potential in realizing neuromorphic and memristor devices. |
DDC: | 530 Physik 530 Physics |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 08 Physik, Mathematik u. Informatik |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-5209 |
Version: | Accepted version |
Publication type: | Zeitschriftenaufsatz |
Document type specification: | Scientific article |
License: | In Copyright |
Information on rights of use: | https://rightsstatements.org/vocab/InC/1.0/ |
Journal: | Applied physics letters 116 24 |
Pages or article number: | Art. 242401 |
Publisher: | American Inst. of Physics |
Publisher place: | Melville, NY |
Issue date: | 2020 |
ISSN: | 0003-6951 |
Publisher URL: | https://doi.org/10.1063/5.0010679 |
Publisher DOI: | 10.1063/5.0010679 |
Appears in collections: | JGU-Publikationen |
Files in This Item:
File | Description | Size | Format | ||
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zhao_xiaoxuan-spin-orbit_tor-20201016145949238.pdf | 1.51 MB | Adobe PDF | View/Open |