Fig. 5: Tailoring merons through OOP-DMI and magnetic field.
From: Reducing crystal symmetry to generate out-of-plane Dzyaloshinskii–Moriya interaction
a–c Magnetic field dependent compound SPLEEM images of in-plane chiral Néel domain wall in the same locations on 3 ML Co/ 3 ML Au/ W(110). Scale bar is 1 µm. d Evolution of the chirality as a function of magnetic field. e–g Magnetic field dependent compound SPLEEM images of a meron in the same locations on 3 ML Co/ 3 ML Au/ W(110). Scale bar is 400 nm. h Evolution of the meron number as the function of a magnetic field. i Compound SPLEEM image of a meron bubble in 3 ML Co/3 ML Pd/ W(110). The colour wheel shows in-plane magnetization. “1” and “2” denote the merons. Scale bar is 500 nm. j Micromagnetic simulation of a meron bubble which is equivalent to a bimeron in the OOP-DMI system. The colour wheel shows in-plane magnetization, and white/black indicates up/down magnetization. k Sketch of spin blocks similar to panel j. l Dependence of topological number Q on various combinations of the two merons’ core polarities. m Micromagnetic simulation of the in-plane chiral antiferromagnetic spin-spiral considering OOP-DMI. n Pixel-by-pixel vector map of the black box region in m.
