Fig. 2: Mechanism and temporal evolution of magnetization reversal of the free [Co/Pt] layer in our collinear.
From: Accelerating ultrafast magnetization reversal by non-local spin transfer
a Schematic of the magnetization reversal process. Solid arrows represent the ferromagnet (atomic) spins, while bullets with arrows represent the injected spin accumulation. The red-shaded Gaussian curve represents the 100 fs (800 nm) pump laser pulse. b Experimental results of the ultrafast magnetization reversal of the [Co/Pt] ferromagnetic multilayer (P configuration) as obtained from our TR-MOKE microscopy measurements and analysis. The magnetization dynamics is seen to happen in three steps: ultrafast demagnetization with spin heating, nonequilibrium recovery of magnetization with ultrafast spin cooling, and equilibrium recovery of magnetization. Error bars are defined in the Supplementary Information. The inset shows the predicted spin accumulation generated in the free [Co/Pt] multilayer by the GdFeCo alloy.
