Current-Induced Dynamics of the Antiferromagnetic Skyrmion and Skyrmionium

Magnetic skyrmions and skyrmionium (a pair of skyrmions with a net topological charge of zero) in ferromagnetic systems continue to be studied intensively, due to their potential for application in spintronic devices. However, the physics and possible applications of their $a\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}f\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}m\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}g\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}c$ (AFM) counterparts still need to be explored. This combined analytical and numerical investigation of the current-driven dynamics of these AFM topological structures reveals the similarities and subtle differences in the influence of AFM texture inertia on skyrmion and skyrmionium dynamics.