Influence of microwave magnetic dissipation on dispersion characteristic of a magnonic crystal

Propagation of spin waves in a one-dimensional magnonic crystal to a finite distance have been studied theoretically and experimentally. It was shown that effective spectrum of spin waves at frequencies close to the Bragg resonances strongly depends on the magnonic crystal length and magnetic dissipation. The emergence of the four serial dispersion regions with positive and negative dispersion close to magnonic crystal stop bands was experimentally confirmed. A comparison of the experimental and theoretical results demonstrated their good qualitative and quantitative coincidence.