Spin-orbit torque switching of perpendicular magnetization in ferromagnetic trilayers
arXiv:2002.02132 · doi:10.1038/s41598-020-58669-1
Abstract
In ferromagnetic trilayers, a spin-orbit-induced spin current can have a spin polarization of which direction is deviated from that for the spin Hall effect. Recently, magnetization switching in ferromagnetic trilayers has been proposed and confirmed by the experiments. In this work, we theoretically and numerically investigate the switching current required for perpendicular magnetization switching in ferromagnetic trilayers. We confirm that the tilted spin polarization enables field-free deterministic switching at a lower current than conventional spin-orbit torque or spin-transfer torque switching, offering a possibility for high-density and low-power spin-orbit torque devices. Moreover, we provide analytical expressions of the switching current for an arbitrary spin polarization direction, which will be useful to design spin-orbit torque devices and to interpret spin-orbit torque switching experiments.
arXiv comment20 pages, 3 figures
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Cited by in corpus (4)
- Switching induced by spin Hall effect in an in-plane magnetized ferromagnet with the easy axis parallel to the current
- Coexistence of unconventional spin Hall effect and antisymmetric planar Hall effect in IrO
- Enhancing Unconventional Spin-Orbit Torque Efficiency: Numerical Study on the Influence of Crystallographic Texture and Polycrystalline Effects on Low-Symmetry Materials
- Threshold Current for Field-free Switching of the In-plane Magnetization in the Three-terminal Magnetic Tunnel Junction