Strain and Magnetic Field Engineering of Skyrmion in the CrSCl Monolayer

Two-dimensional Janus magnets provide a natural platform for stabilizing chiral spin textures because of their intrinsic broken inversion symmetry. However, achieving controllable switching between distinct topological spin states is of particular importance for future information storage and spintronic computing architectures based on multilevel bits. Furthermore, understanding the underlying mechanisms governing their stability under external perturbations remains challenging. Here, on the basis of first-principles calculations combined with Monte Carlo and atomistic spin simulations, we demonstrate that the CrSCl monolayer hosts robust and tunable topological spin textures. We reveal that the direction of the applied magnetic field enables reversible switching between skyrmion and bimeron states, providing a simple and efficient control mechanism. Furthermore, the tensile strain significantly enhances the skyrmion stability window. Our results uncover a cooperative effect of the magnetic field orientation and strain engineering on topological spin textures, offering a viable route toward controllable skyrmion-based spintronic devices.