  The interplay of topological defects with curvature is studied for
out-of-surface magnetic vortices in thin spherical nanoshells. In the case of
easy-surface Heisenberg magnet it is shown that the curvature of the underlying
surface leads to a coupling between the localized out-of-surface component of
the vortex with its delocalized in-surface structure, i.e. polarity-chirality
coupling.
