  We theoretically investigate coupled gyration modes of magnetic solitons
whose distances to the nearest neighbors are staggered. In a one-dimensional
bipartite lattice, analogous to the Su-Schrieffer-Heeger model, there is a
mid-gap gyration mode bounded at the domain wall connecting topologically
distinct two phases. As a technological application, we show that a
one-dimensional domain-wall string in a two-dimensional soliton lattice can
serve as a topological waveguide of magnetic excitations, which offers
functionalities of a signal localization and a selective propagation of the
frequency modes. Our result offers an alternative way to control of the
magnetic excitation modes by using a magnetic metamaterial for future
spintronic devices.
