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The magnonic band gaps of the two types of planar one-dimensional magnoniccrystals comprised of the periodic array of the metallic stripes on yttriumiron garnet (YIG) film and YIG film with an array of grooves was analyzedexperimentally and theoretically. In such periodic magnetic structures thepropagating magnetostatic surface spin waves were excited and detected bymicrostripe transducers with vector network analyzer and by Brillouin lightscattering spectroscopy. Properties of the magnonic band gaps were explainedwith the help of the finite element calculations. The important influence ofthe nonreciprocal properties of the spin wave dispersion induced by metallicstripes on the magnonic band gap width and its dependence on the externalmagnetic field has been shown. The usefulness of both types of the magnoniccrystals for potential applications and possibility for miniaturization arediscussed.

Magnonic band gaps in YIG based magnonic crystals: array of grooves versus array of metallic stripes