Fig. 3: Magnetic domain structure and evolution of various spin objects in an applied OOP magnetic field.
From: Dipolar skyrmions and antiskyrmions of arbitrary topological charge at room temperature
a, Room temperature OOP and IP M–H hysteresis loops of a [Co/Ni]10 multilayer including the stability range of different spin objects. b,c, LTEM image (b) at zero field showing domain walls with VBLs highlighted with red boxes, and corresponding induction map (c). d–g, Evolution of the magnetic domain structure at different applied OOP magnetic fields of 32 mT (d), 44 mT (e), 52 mT (f) and 60 mT (g). Red and green circles mark Q = 3 and Q = 4 ASKs, respectively. Blue, yellow, orange and brown circles mark Q = −1, −2, −3 and, most likely, Q = −9 SKs, respectively. h–k, Snapshots from micromagnetic simulations illustrated as induction maps showing the field-dependent collapse of a Q = −7 SK (h), to a Q = −5 (i), to a Q = −3 (j) and, finally, Q = −1 SK (k). Scale bars, 1 µm (b–g), 200 nm (h–k).
