Single Shot Ultrafast All Optical Magnetization Switching of Ferromagnetic Co/Pt Multilayers
Magneto-optical images of a GdFeCo/[Co/Pt] stack, that illustrate the possibility of switching the magnetization in both layers, via single linearly polarized laser shots.
Demonstrated magnetization switching of ferromagnetic films, within 7 picoseconds, via single laser shots.
Significance and Impact
Harnessing the strong exchange coupling between a ferri- and a ferro-magnetic film for ultrafast all-optical switching of the ferromagnet expands greatly the suitable class of materials for ultrafast spintronic applications.
- Ferromagnetic Co/Pt multilayers are grown on top of ferrimagnetic GdFeCo films.
- Single femtosecond laser pulses (of any polarization) are known to induce the reversal of GdFeCo magnetization, but here both layers switch after a laser shot due to the exchange coupling with the Co/Pt.
- Depth-sensitive and time-resolved magneto-optical measurements determined the fast dynamics of each magnetic layer.