Cheow Hin Sim, Jian Cheng Huang, Michael Tran, Kwaku Eason
Published 2013-10-10Version 1
Measurements of switching via spin-orbit coupling (SOC) mechanisms are discussed for a pair of inverted Pt/Co/Pt stacks with asymmetrical Pt thicknesses. Taking into account the planar Hall effect contribution, effective fields of spin-orbit torques (SOT) are evaluated using lock-in measurements of the first and second harmonics of the Hall voltage. Reversing the stack structure leads to significant asymmetries in the switching behavior, including clear evidence of a nonlinear current dependence of the transverse effective field. Our results demonstrate potentially complex interplay in devices with all-metallic interfaces utilizing SOT.
Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures
Switching of perpendicular magnetization by spin-orbit torques in the absence of external magnetic fields
Ultrafast magnetization switching by spin-orbit torques
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