Perpendicular magnetization reversal in Pt/[Co/Ni]${}_3$/Al multilayers via the Spin Hall Effect of Pt

Abstract

We experimentally investigate the current-induced magnetization reversal in Pt/[Co/Ni]${}_3$/Al multilayers combining the anomalous Hall effect and magneto-optical Kerr effect techniques in crossbar geometry. The magnetization reversal occurs through nucleation and propagation of a domain of opposite polarity for a current density of the order of 0.3 TA/m${}^2$. In these experiments we demonstrate a full control of each stage: i)the Ørsted field controls the domain nucleation and ii) domain-wall propagation occurs by spin torque from the Pt spin Hall effect. This scenario requires an in-plane magnetic field to tune the domain wall center orientation along the current for efficient domain wall propagation. Indeed, as nucleated, domain walls are chiral and Néel like due to the interfacial Dzyaloshinskii-Moriya interaction.

5 pages, 3 figures

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• Magnetic switching by spin torque from the spin Hall effect
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• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
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• Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires
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• Interfacial Dzyaloshinskii-Moriya interaction in Ta\Co20Fe60B20\MgO nanowires
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• Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy
• Thermal contribution to the spin-orbit torque in metallic/ferrimagnetic systems
• Electrical control over perpendicular magnetization switching driven by spin-orbit torques
• Effects of Oxidation of Top and Bottom Interfaces on the Electric, Magnetic, and Spin-Orbit Torque Properties of Pt/Co/AlOx Trilayers
• Intermittent collective dynamics of domain walls in the creep regime
• Transient magnetic domain wall AC dynamics by means of MOKE microscopy
• Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy
• Excess velocity of magnetic domain walls close to the depinning field
• Unconventional anomalous Hall effect in 3d/5d multilayers mediated by the nonlocal spin-conductivity
• Field-free perpendicular magnetization switching through domain wall motion in Pt/Co/Cr racetracks by spin orbit torques with the assistance of accompanying Joule heating effect
• Universal Absence of Walker Breakdown and Linear Current-Velocity Relation via Spin-Orbit Torques in Coupled and Single Domain Wall Motion
• Room-Temperature Magnetic Skyrmions in Pt/Co/Cu Multilayers
• Spin-orbit torques and magnetization switching in perpendicularly magnetized epitaxial Pd/Co2FeAl/MgO structures
• Advanced method for reliable estimation of the spin-orbit torque efficiency in low coercive ferromagnetic multilayers
• Spin current transport in hybrid Pt / multifunctional magnetoelectric Ga0.6Fe1.4O3 bilayers
• Electric field effect on electron gas spins in two-dimensional magnets with strong spin-orbit coupling
• Curvature-driven AC-assisted creep dynamics of magnetic domain walls