ScholarWorks@성균관대학교

초록

Conventionally, spin-orbit torque (SOT) in a nonmagnet/ferromagnet bilayer was attributed to spin current generation in a nonmagnet. Recent discovery of the orbital generation mechanism enables an orbital version of spin-orbit torque. However, orbital torque requires an efficient orbital-to-spin conversion process, which is often weak in a conventional 3d ferromagnet. In this study, we demonstrated strong orbital torque in the Ti/Co1-xPtx bilayer, where Ti generates orbital current and Co1-xPtx converts orbital current into spin current. SOT efficiency increases with Pt concentration and reaches +0.18 at Co0.5Pt0.5 composition.

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