Magnetostatic wave propagation in a periodic structure

Abstract

Magnetostatic wave propagation at microwave frequencies through a periodic structure formed by selectively etching the surface of an epitaxial yttrium iron garnet (YIG) film is reported. Experimental insertion loss data obtained in the 2–4-GHz range from a structure comprising 20 grooves each 1 μm deep and 30 μm wide, and each separated by 120 μm, formed in a 9-μm-thick YIG film are in good agreement with theory based on repetitively mismatched transmission lines.