Abstract

An analytical expression for the effective damping coefficient (EDC) of propagating spin waves (SW's) in a magnonic crystal is obtained and analyzed. The analysis shows that the EDC depends strongly upon the SW frequency and the bias magnetic field. This dependence is more pronounced when damping is localized in vicinity of interfaces. It is shown that magnonic crystals with very big or very small EDC (for a given SW frequency range) can be designed by means of a proper choice of the depth of modulation of magnetic parameters.

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