Received Jule 24, 2019, published online October 25, 2019
For antiferromagnets, lattice dislocations are the origin of the singular line in the field of the antiferromagnetic vector l, common to disclinations in the field of vector-director for nematic liquid crystals. Single atomic dislocation produces non-localized state, spin disclination. It is shown that “compensated” system of dislocations, closed dislocation loop in three-dimensional (3D) AFM or pair of point dislocations in two-dimensional (2D) AFM, produces localized spin non-uniformity, common to soliton. For isotropic or easy-plane AFM the form is ellipsoidal or circular in 3D or 2D cases, accordingly. The geometry of lattice defect and soliton is significantly different, for example, the planar lattice defect (dislocation loop) produces almost-spherical 3D spin non-uniformity. In the presence of inplane anisotropy, the domain wall ending on the dislocation line (points) is formed.