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We report on a micromagnetic simulation study of coupled core gyrations in one-dimensional (1D) alternating vortex-antivortex (V-AV) lattices formed in connected soft-magnetic-disk arrays. In such V-AV lattices, we found fundamental standing-wave gyration modes as well as significantly enhanced gyration-signal speed, as originating from combined strong exchange and dipole interactions between the neighboring vortices and antivortices. Collective core oscillations in the V-AV networks are characterized as unique two-branch bands, band gap, and width of which are remarkably variable and controllable by externally applied perpendicular fields. The gyration propagation speed for the parallel polarization ordering is much faster (>1 km/s) than that for 1D vortex-state arrays, and variable remarkably by application of perpendicular static fields. This work provides a fundamental understanding of the coupled dynamics of topological solitons as well as an additional mechanism for fast gyration-signal propagation;...

Enhanced gyration-signal propagation speed in one-dimensional vortex-antivortex lattices and its control by perpendicular bias field