Study of magnetization reversal processes in a thin Co film

► Kerr microscopy was performed for different field orientation to the easy axis. ► Here we have measured domain wall velocity in constant dc fields. ► Creep, depinning and slide modes of domain wall motion have been observed. ► Magnetic relaxation data can be very well fitted to Fatuzzo-Labrune model. ► Magnetization reversal occurs via domain nucleation and wall motion.