Abstract
Exploring and controlling topological textures such as merons and skyrmions has attracted enormous interests from the perspective of fundamental research and spintronic applications. It has been predicted theoretically and proved experimentally that the lattice form of topological meron-skyrmion transformation can be realized with the requirement of external magnetic fields in chiral ferromagnets. However, such topological transition behavior has yet to be verified in other materials. Here, we report real-space observation of magnetic topology transformation between meron pairs and skyrmions in the localized domain wall of ferrimagnetic GdFeCo films without the need of magnetic fields. The topological transformation in the domain wall of ferrimagnet is introduced by temperature-induced spin reorientation transition (SRT) and the underlying mechanism is revealed by micromagnetic simulations. The convenient electric-controlling topology transformation and driving motion along the confined domain wall is further anticipated, which will enable advanced application in magnetic devices.
Highlights
Exploring and controlling topological textures such as merons and skyrmions has attracted enormous interests from the perspective of fundamental research and spintronic applications
We demonstrate the topological transformation between meron pairs and skyrmions in the domain wall via the temperature-induced spin reorientation transition (SRT) and their electric control capability, which does not require any external magnetic field unlike that in chiral lattices[1,2,38]
The inplane magnetization distribution on both sides of the selected domain wall is reconstructed from the transport-of-intensity equation (TIE) analysis and is displayed in Fig. 1c and i, respectively
Summary
Exploring and controlling topological textures such as merons and skyrmions has attracted enormous interests from the perspective of fundamental research and spintronic applications It has been predicted theoretically and proved experimentally that the lattice form of topological meron-skyrmion transformation can be realized with the requirement of external magnetic fields in chiral ferromagnets. We demonstrate the topological transformation between meron pairs and skyrmions in the domain wall via the temperature-induced spin reorientation transition (SRT) and their electric control capability, which does not require any external magnetic field unlike that in chiral lattices[1,2,38]
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