In this study, we report experimental results on perpendicular magnetic tunnel junctions composed of the binary multilayer Co/Pt and Co/Pd with various MgO barrier thicknesses. The coercivities of both Co/Pt and Co/Pd layers varied substantially with the MgO thickness. Very interestingly, the perpendicular anisotropy constant Ku of the Co/Pt multilayer measured by the extraordinary Hall effect oscillated with the MgO thickness, and the period of this oscillation was about 0.3 nm. Furthermore, both the Ku value and the oscillation amplitude decreased after annealing at 150 C and 200 C, which suggest that the oscillation may result from the film morphology.Index Terms-Extraordinary Hall effect (EHE), perpendicular anisotropy constant, perpendicular magnetic tunnel junctions (pMTJs).
We present a study on the influence of the canting angle between the magnetization vectors of a two-subnetwork system on the magnetization switching exerted by a spin-polarized induced current. Numerical calculations are performed on current-induced magnetization switching in a magnetic system with a canting state. The modified Landau-Lifshitz-Gilbert equation is used to produce quantitative predictions for the critical current as a function of the exchange coupling constant (which characterizes the canting strength) at several applied magnetic fields. The results indicate that the critical current reduces its value to one third when the coupling constant is varied.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.