  The control of domain walls is central to nearly all magnetic technologies,
particularly for information storage and spintronics. Creative attempts to
increase storage density need to overcome volatility due to thermal
fluctuations of nanoscopic domains and heating limitations. Topological
defects, such as solitons, skyrmions, and merons, may be much less susceptible
to fluctuations, owing to topological constraints, while also being
controllable with low current densities. Here, we present the first evidence
for soliton/soliton and soliton/antisoliton domain walls in the hexagonal
chiral magnet Mn1/3NbS2 that respond asymmetrically to magnetic fields and
exhibit pair-annihilation. This is important because it suggests the
possibility of controlling the occurrence of soliton pairs and the use of small
fields or small currents to control nanoscopic magnetic domains. Specifically,
our data suggest that either soliton/soliton or soliton/antisoliton pairs can
be stabilized by tuning the balance between intrinsic exchange interactions and
long-range magnetostatics in restricted geometries
