The phase diagrams of the frustrated classical spin model with the Dzyaloshinskii–Moriya (DM) interaction on the Shastry–Sutherland lattice are studied by means of Monte Carlo simulations. For ferromagnetic next‐nearest‐neighboring (J2) interactions, the introduced exchange frustration enhances the effect of the DM interaction, which enlarges the magnetic field‐range with the skyrmion lattice phase and increases the skyrmion density. For antiferromagnetic J2 interactions, the so‐called 2q phase (two‐sublattice skyrmion crystal) and the spin‐flop phase are observed, and their stabilizations are closely dependent on the DM interaction and J2 interaction, respectively. The simulated results are qualitatively explained from the energy competitions among these couplings, which provide an important guidance for finding skyrmion crystals in frustrated magnets.
The skyrmion lattice phase and antiferromagnetic skyrmion 2q phase are unveiled theoretically in frustrated Shastry–Sutherland model with the interfacial Dzyaloshinskii–Moriya interaction which may be induced in the interface between heavy metal and magnet. First, the introduced exchange frustration enhances the effect of the Dzyaloshinskii–Moriya interaction, which not only enlarges the magnetic field region with the skyrmion lattice phase but also increases the density of the skyrmions. Second, the stabilization of the antiferromagnetic skyrmion phase is closely dependent on the Dzyaloshinskii–Moriya and exchange interactions. Thus, the work by Minghui Qin and co‐workers in article number http://doi.wiley.com/10.1002/pssr.201900161 provides an important guidance for finding skyrmion crystals in frustrated magnets.
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