  We show on in-plane magnetized thin films that magnetization can be switched
efficiently by 180 degrees using large amplitude Rayleigh waves travelling
along the hard or easy magnetic axis. Large characteristic filament-like
domains are formed in the latter case. Micromagnetic simulations clearly
confirm that this multi-domain configuration is compatible with a resonant
precessional mechanism. The reversed domains are in both geometries several
hundreds of \mu m^2, much larger than has been shown using spin transfer
torque- or field-driven precessional switching. We show that surface acoustic
waves can travel at least 1mm before addressing a given area, and can interfere
to create magnetic stripes that can be positionned with a sub-micronic
precision.
