Fig. 4: The meron–skyrmion transformation in the domain wall driven by an electric current at room temperature. | Nature Communications

Fig. 4: The meron–skyrmion transformation in the domain wall driven by an electric current at room temperature.

From: Field-free topological behavior in the magnetic domain wall of ferrimagnetic GdFeCo

Fig. 4

a Schematic illustration for electric current manipulation. b–e The disappearance of white contrast of L-TEM images and TIE analysis showing the domain wall transformation from merons to skyrmions under the electric current of 18 mA in Gd15+x(Fe94Co6)85−x (x = 0.4). f–k The magnetic domain evolution under the electric current of 0, 38, 44, and 55 mA in Gd15+x(Fe94Co6)85−x (x = 0.7), respectively. The enlarged domain wall textures with in-plane magnetization for selected domain wall regions in c, d, g, h manifest the possible topology transformation. The color wheel for the direction of in-plane magnetization is displayed in the inset. The scale bar is 1 μm.

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