Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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Deterministic multi-level spin orbit torque switching using focused He+ ion beam irradiation

Kurian, J.; Joseph, A.; Cherifi-Hertel, S.; Fowley, C.; Hlawacek, G.; Dunne, P.; Romeo, M.; Atcheson, G.; Coey, J. M. D.; Doudin, B.


He+ ion irradiation is used to pattern multiple areas of Pt/Co/W films with different irradiation doses in Hall bars. The resulting perpendicular magnetic anisotropy landscape enables selective multilevel currentinduced switching, with full deterministic control of the position and order of the individual switching elements. Key pattern design parameters are specified, opening a way to scalable multilevel switching devices.

Keywords: spintronics; spin orbit torque switching; nanomagnetism; ion beam irradiation; Hall bars

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