Extended Data Fig. 10: Lorentz TEM images showing the nucleation of magnetic antiskyrmions.
From: Skyrmion–antiskyrmion pair creation and annihilation in a cubic chiral magnet

The initial state of the system has no closed domain walls that converge to form skyrmions with increasing field. h-k show skyrmion-antiskyrmion pairs, which annihilate with each other with increasing field (compare i and j, k and l).