Periodic equilibrium examples for 1D structures with one (a), two (b–d), and four (e–g) particle unit cells. Red and blue circles denote magnets with dipole moments perpendicular to the lattice plane pointing towards and away from the reader respectively. Black lines denote elastic connections between magnets. Reprinted from M. Schaeffer and M. Ruzzene, Wave propagation in multistable magneto-elastic lattices, Int. J. Solids Struct. 56–57 (2015) 78–95, copyright (2015), with permission from Elsevier.