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This work studies the resonance excitations of the three-dimensionalskyrmions lattice in the finite thickness plate of an isotropic chiral magnetusing spin dynamics simulations. We found that the absorption spectra andresonance modes differ from those predicted by the two-dimensional model andthe model of the unconfined bulk crystal. The features observed on the spectracan be explained by the formation of chiral standing spin waves, which,contrary to conventional standing spin waves, are characterized by the helicalprofile of dynamic magnetization of fixed chirality defined by theDzyaloshinskii-Moriya interaction. In this case, the dynamic susceptibilitybecomes a function of the plate thickness, which gives rise to an interestingeffect that manifests itself in periodical fading of the intensity ofcorresponding modes and makes excitation of these modes impossible at specificthicknesses.

Chiral standing spin waves in skyrmion lattice