External-magnetic-field-free switching of the perpendicular magnetic anisotropy in magnetic layers is a prerequisite for the wide adoption of spintronic devices. This challenge could be met by the Weyl semimetal TaIrTe4, which is now shown to generate an out-of-plane polarized spin current at room temperature.
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Miron, I. M. et al. Perpendicular switching of a single ferromagnetic layer induced by in-plane current injection. Nature 476, 189–193 (2011). This paper reports SOT-induced PMA switching with an external field.
Liu, L. et al. Spin-torque switching with the giant spin Hall effect of tantalum. Science 336, 555–558 (2012). This paper reports SOT-induced in-plane magnet switching.
Shao, Q. et al. Roadmap of spin–orbit torques. IEEE Trans. Magn. 57, 1–39 (2021). A review article that discusses the bottleneck of the SOT-induced PMA switching.
Shi, S. et al. All-electric magnetization switching and Dzyaloshinskii–Moriya interaction in WTe2/ferromagnet heterostructures. Nat. Nanotechnol. 14, 945–949 (2019). This paper reports field-free in-plane magnet switching with WTe2 at room temperature.
Kao, I.-H. et al. Deterministic switching of a perpendicularly polarized magnet using unconventional spin–orbit torques in WTe2. Nat. Mater. 21, 1029–1034 (2022). This paper reports field-free PMA switching with WTe2 at low temperatures.
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This is a summary of: Liu, Y. et al. Field-free switching of perpendicular magnetization at room temperature using out-of-plane spins from TaIrTe4. Nat. Electron. https://doi.org/10.1038/s41928-023-01039-2 (2023).
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Field-free and unconventional switching of perpendicular magnetization at room temperature. Nat Electron 6, 724–725 (2023). https://doi.org/10.1038/s41928-023-01040-9