Fig. 2: Optical spin–orbit torque.
From: Optical spin-orbit torque in heavy metal-ferromagnet heterostructures
a The measured dynamics of the z-component of Co magnetization in the sap/Pt(5)/Co(3)/MgO(3) sample driven by pump pulse, incident on the substrate side, with right circular polarization (RCP) (black squares), left circular polarization (LCP) (red circles), and linear polarization (blue triangles). Given the negative value of the static Kerr rotation of Co (Supplementary Note 6), positive/negative Δθ of a indicates –z/+z tilting of magnetization. b The comparison of the Mz (black squares) and My (red circles) dynamics of Co in the sap/Pt(5)/Co(3)/MgO(3) sample. The black and red lines are fitting with cosine and sine functions, respectively.
