V. D. Bessonov, M. Mruczkiewicz, R. Gieniusz, U. Guzowska, A. Maziewski, A. I. Stognij, and M. Krawczyk
Phys. Rev. B 91, 104421 (2015)
Experimental and theoretical study of magnonic band gaps in planar one-dimensional magnonic crystals of two types, with a periodic array of metallic stripes or a periodic array of grooves on an yttrium iron. Demonstration of significant influence of the nonreciprocity in spin-wave dispersion induced by metallic stripes on the width of the magnonic band gap. The indirect character of the band gap and the higher group velocity of spin waves in the nonreciprocal magnonic crystal are identified, as well as their contribution to the wider band gap and steeper decrease of its width with increasing magnetic field, as compared to the grooved magnonic crystal .
Fig.1. Magnonic band structure in the first Brillouin zone calculated for sample A (blue dashed line) and sample B (red solid line) with magnetic field μ0H0=0.1 T.
