Deterministic multi-level spin orbit torque switching using focused He<b>+</b> ion beam irradiation
Jinu Kurian, Aleena Joseph, S. Cherifi, Ciarán Fowley, Gregor Hlawacek, Peter Dunne, Michelangelo Romeo, Gwenaël Atcheson, J. M. D. Coey, Bernard Doudin
Abstract
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 current-induced 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 multi-level switching devices.
Topics & Concepts
IrradiationMaterials scienceIonAnisotropyIon beamTorqueBeam (structure)Position (finance)Orbit (dynamics)OptoelectronicsPhysicsOpticsAerospace engineeringEngineeringEconomicsFinanceThermodynamicsQuantum mechanicsNuclear physicsAdvanced Memory and Neural ComputingMagnetic properties of thin filmsAdvanced Data Storage Technologies