  Magnetic vortex, as one of the most interesting magnetic solitons, has
attracted great interests in the past two decades. A fast and reliable method
to switch vortex polarity and chirality is one of the key issues for various
applications. Based on micromagnetic simulation, here we report a fast, low
energy cost and deterministic switching of vortex core, through the designing
of a notch structure in disks and the use of out-of-plane current geometry. We
demonstrate that with such design, the multiple switching problems found in
notch disk system can be avoided. Furthermore, the switching time can be
reduced by more than 50% compared with disks without notch.
