The study of skyrmion/antiskyrmion motion in magnetic materials is very important in particular for the spintronics applications. In this work, we study the dynamics of isolated skyrmions and antiskyrmions in frustrated magnets driven by magnetic field gradient, using the Landau-Lifshitz-Gilbert simulations on the frustrated classical Heisenberg model on the triangular lattice. A Hall-like motion induced by the gradient is revealed in bulk system, similar to that in the well-studied chiral magnets. More interestingly, our work suggests that the lateral confinement in nanostripes of the frustrated system can completely suppress the Hall motion and significantly speed up the motion along the gradient direction. The simulated results are well explained by Thiele theory. It is demonstrated that the acceleration of the motion is mainly determined by the Gilbert damping constant, which provides useful information for finding potential materials for skyrmion-based spintronics.

In this work, we study the microscopic dynamics of distorted skyrmions in strained chiral magnets (Shibatak et al 2015 Nat. Nanotechnol. 10 589) under gradient magnetic field and electric current by Landau-Lifshitz-Gilbert simulations of the anisotropic spin model. It is observed that the dynamical responses are also anisotropic, and the velocity of the distorted skyrmion is periodically dependent on the directions of the external stimuli. Furthermore, in addition to the uniform motion, our work also demonstrates an anti-phase harmonic vibration of the two skyrmions in nanostripes, and the frequencies can be effectively modulated by the anisotropic Dzyaloshinskii-Moriya interaction. The simulated results are well explained by Thiele's theory, which may provide useful information in understanding the dynamics of the distorted skyrmions.

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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