  Skyrmions, which are topologically stable magnetic structures, have
manifested promising features to be used as an information carrier in new-age,
non-volatile data storage devices. In this article, we show how the creation
and stability of skyrmion can be manipulated by external stimuli (here,
nano-second current pulse). Co/Pt square nano-structure with Co free layer
thickness in the range 1 nm to 5 nm and first and second-order anisotropy
constants are taken to study the controlled creation of skyrmions. The
magnetization dynamics controlled by the current-induced spin transfer torque
help to nucleate skyrmions by transformation from perpendicularly magnetized
ground state to a stable state of isolated skyrmions via complex transformation
of Neel wall following its image inversion. Compared with the first-order
anisotropy alone, how the higher-order anisotropy constants (up to second
order) impact the relaxed state of a system has been discussed.
