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Ultrafast spin–orbit torque-induced magnetization switching in a 75°-canted magnetic tunnel junction.
- Source :
- AIP Advances; Feb2024, Vol. 14 Issue 2, p1-5, 5p
- Publication Year :
- 2024
-
Abstract
- We investigate the switching dynamics of a 75°-canted Spin–orbit torque (SOT) device with an in-plane easy axis using the micro-magnetic simulation. The switching time (τ) is evaluated from the time evolution of the magnetization. The device with a strong out-of-plane magnetic anisotropy (μ<subscript>0</subscript>H<subscript>k</subscript><superscript>eff</superscript> = −0.08 T) shows τ = 0.19 ns while a device with a strong in-plane magnetic anisotropy (μ<subscript>0</subscript>H<subscript>k</subscript><superscript>eff</superscript> = −0.9 T) shows τ = 0.32 ns. The increase of the damping constant (α) results in the increase of τ for both devices and the sub-nanosecond switching could be retained as α < 0.14 in the device with μ<subscript>0</subscript>H<subscript>k</subscript><superscript>eff</superscript> = −0.08 T, while this was achieved as α < 0.04 in the device with μ<subscript>0</subscript>H<subscript>k</subscript><superscript>eff</superscript> = −0.9 T. Furthermore when the field-like coefficient (β) is increased, it leads to a decrease in τ, which can be reduced to 0.03 ns by increasing β to 1 in the device with μ<subscript>0</subscript>H<subscript>k</subscript><superscript>eff</superscript> = −0.08 T. In order to achieve the same result in the device with μ<subscript>0</subscript>H<subscript>k</subscript><superscript>eff</superscript> = −0.9 T, β must be increased to 6. These results indicate a way to achieve ultrafast field-free SOT switching of a few tens of picoseconds in nanometer-sized magnetic tunnel junction (MTJ) devices. [ABSTRACT FROM AUTHOR]
- Subjects :
- MAGNETIC tunnelling
MAGNETIC control
MAGNETIC anisotropy
MAGNETIZATION
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 14
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- AIP Advances
- Publication Type :
- Academic Journal
- Accession number :
- 175797045
- Full Text :
- https://doi.org/10.1063/9.0000789