Topological Spin Textures in Fe₃GaTe₂ Triggered Correlated by with the Coexistence of Distinct Magnetic Phases

The recently discovered layered ferromagnet Fe₃GaTe₂ is attracting significant attention due to its high Curie temperature, low dimensionality, and the presence of topological spin textures , and a large anomalous Hall effect even above room temperature, which make Fe₃GaTe₂ a good candidate for applicationsfuture devices utilizing their topological spin textures. in spintronics. To fully realize its potential, an exact characterization of its magnetic nature and discovering the mechanism for its topological spin texture is essential. Here, a comprehensive understanding of the magnetic response and its correlating to the electronic transport properties of Fe₃GaTe₂ is essential. Therefore, we conducted a comprehensive study of Fe₃GaTe₂ via magnetization, electrical transport, and magnetic imaging techniques, i.e., Lorentz transmission electron microscopy (LTEM) and magnetic force microscopy (MFM). wWe found that Fe₃GaTe₂ has a metastable ferromagnetic (FM) state with a stable ferrimagnetic (FiM) state, representing complex magnetic manifestation also correlated with the magnetic anisotropy and magnetic dipole-dipole interaction. Interestingly, displays a first-order transition from ferromagnetism (FM) to ferrimagnetism (FiM) at relatively low fields. Interestingly, the topological Hall effect and the magnetic bubble structures shown in the MFM image display their predominance displays a maximum at the magnetic phase boundary, implying competing magnetic interaction has a crucial role in the topological spin texture. between both phases, suggesting that mixed magnetic states play a relevant role in stabilizing topological spin textures. This observation is supported by MFM imaging which reveals magnetic bubbles when the topological Hall effect maximizes. Furthermore, we found the coincidence between magnetic thermal hysteresis caused by competing FM and FiM phases and the thermal hysteresis of observed in the skyrmion density measured through LTEM images,. and thermal hysteresis in the magnetizationThese results suggest that utilizing the distinct magnetic phases can be a useful skyrmion control factor in Fe₃GaTe₂. Conclusively, provides evidence for a correlation between the transition among both magnetic states and the emergence of topological spin textures. wWe extracted a magnetic phase diagram for Fe₃GaTe_2, exposing a hitherto unreported correlation between topological spin textures and the coexistence of FM with FiM domains.distinct magnetic interactions.