Strain-enabled control of chiral magnetic structures in MnSeTe monolayer


 Chiral magnetic states are promising for the future spintronic applications. Recent progress of chiral spin textures in two-dimensional magnets, such as chiral domain walls (DW), skyrmions, and bimerons, have been drawing extensive attention. Here, via first-principles calculations, we show that biaxial strain can effectively manipulate the magnetic parameters of the Janus MnSeTe monolayer. Interestingly, we find that both the magnitude and the sign of the magnetic constants of the Heisenberg exchange coupling, Dzyaloshinskii-Moriya interaction (DMI) and magnetocrystalline anisotropy (MCA) can be tuned by strain. Moreover, using micromagnetic simulations, we obtain the distinct phase diagram of chiral spin texture under different strain. Especially, we demonstrate that abundant chiral magnetic structures including ferromagnetic skyrmion, skyrmionium, bimeron, and antiferromagnetic spin spiral can be induced in the MnSeTe monolayer. We have also discussed the effect of temperature on these magnetic structures. These findings highlight the Janus MnSeTe monolayer as a good candidate for spintronic nanodevices.