Effect of Periodic Array's Geometry on spin-wave Spectrum of ferrite magnonic Crystals
Spin-wave excitation spectra of tangentially magnetized 2D ferrite magnonic crystals obtained by etching of rhombic and square (unit cells are 37-42 mkm) antidot array of 32 mkm diameter holes in 5 mkm thickness yttrium-iron garnet film were experimentally in-vestigated. Spectra were found to change from resonant to broadband depending on the angle between the directions of the bias magnetic field and axis of magnonic crystals according to their symmetry. Regions of spin-wave excitations localization inside magnonic crystals' area were determined using a numerical calculation of the distribution of internal magnetic field.