Wave modes of collective vortex gyration in dipolar-coupled-dot-array magnonic crystals
Wave modes of collective vortex gyration in dipolar-coupled-dot-array magnonic crystals
Lattice vibration modes are collective excitations in periodic arrays of atoms or molecules. These modes determine novel transport properties in solid crystals. Analogously, in periodical arrangements of magnetic vortex-state disks, collective vortex motions have been predicted. Here, we experimentally observe wave modes of collective vortex gyration in one-dimensional (1D) periodic …