  Exotic spin textures viz. chiral domain wall, vortices, skyrmion,
skyrmionium, etc. have recently emerged as active field of research because of
their potential applications in high density data storage technology and logic
gate computing. Magnetic skyrmionium is a skyrmion like soliton, which carries
zero topological quantum number. Skyrmioniums are superior to conventional
skyrmions in ferromagnets due to their negligible skyrmion hall effect and
higher velocity. The physical properties of both skyrmion and skyrmionium have
been investigated rigorously in ferromagnetic systems. Recent observations hint
that such chiral spin structures in antiferromagnetic (AFM) systems are more
promising in comparison to the ferromagnetic ones because of their robustness
towards external perturbation, absence of Skyrmion hall effect, etc. However
skyrmionium in AFM materials are not reported in literature so far. In this
work, we demonstrate that skyrmionium can be created and stabilized in AFM
materials by application of spin polarized current in an experimentally
feasible geometry. We have further studied the dynamics of AFM skyrmionium by
applying spin polarized current.
