Design parameters for field-free spin–orbit torque switching of perpendicular synthetic antiferromagnets

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Design parameters for field-free spin–orbit torque switching of perpendicular synthetic antiferromagnets
Title:
Design parameters for field-free spin–orbit torque switching of perpendicular synthetic antiferromagnets
Other Titles:
Journal of Applied Physics
Publication Date:
22 April 2021
Citation:
BingJin Chen, James Lourembam, Hong Jing Chung, and Sze Ter Lim , "Design parameters for field-free spin–orbit torque switching of perpendicular synthetic antiferromagnets", Journal of Applied Physics 129, 163901 (2021) https://doi.org/10.1063/5.0033745
Abstract:
We report micromagnetic simulations of spin–orbit torque (SOT) induced magnetization switching of a ferromagnetic layer with perpendicular anisotropy in the absence of an external magnetic field. Field-free switching is achieved by antiferromagnetic interlayer exchange coupling (IEC) between two perpendicular ferromagnetic layers. At appropriate IEC values and an SOT current density exceeding the critical value (Jc), magnetization reversal can be achieved within sub-ns. The complete magnetization reversal of the synthetic antiferromagnetic free layer occurs upon removing the current pulse. Higher damping is preferred for the proposed switching scheme, as Jc decreases with the increase of damping. Remarkably, we also found that Jc has a parabolic dependence on the nanomagnet's diameter, with the vertex occurring at 90 nm.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the Agency for Science, Technology and Research - RIE2020 AME Programmatic Grant
Grant Reference no. : A18A6b0057
Description:
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in BingJin Chen, James Lourembam, Hong Jing Chung, and Sze Ter Lim , "Design parameters for field-free spin–orbit torque switching of perpendicular synthetic antiferromagnets", Journal of Applied Physics 129, 163901 (2021) https://doi.org/10.1063/5.0033745 and may be found at https://doi.org/10.1063/5.0033745
ISSN:
0021-8979
1089-7550
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