  A stable skyrmion, representing the smallest realizable magnetic texture,
could be an ideal element for ultra-dense magnetic memories. Here, we review
recent progress in the field of skyrmionics, which is concerned with studies of
tiny whirls of magnetic configurations for novel memory and logic applications,
with a particular emphasis on antiskyrmions. Magnetic antiskyrmions represent
analogs of skyrmions with opposite topological charge. Just like skyrmions,
antiskyrmions can be stabilized by the Dzyaloshinskii-Moriya interaction, as
has been demonstrated in a recent experiment. Here, we emphasize differences
between skyrmions and antiskyrmions, e.g., in the context of the topological
Hall effect, skyrmion Hall effect, as well as nucleation and stability. Recent
progress suggests that anitskyrmions can be potentially useful for many device
applications. Antiskyrmions offer advantages over skyrmions as they can be
driven without the Hall-like motion, offer increased stability due to dipolar
interactions, and can be realized above room temperature.
