Formation of couples of topological defects in one-dimensional magnetic dipole systems R. Dimitrov, O. V. Dimitrova, L. Arda, Y. E. Parmaksiz and Atilla Ak Eur. Phys. J. Plus, 137 7 (2022) 837 Published online: 20 July 2022 DOI: 10.1140/epjp/s13360-022-03052-4