Design and optimization of one-dimensional ferrite-film based magnonic crystals

作者：Chumak A V^*; Serga A A; Wolff S; Hillebrands B; Kostylev M P

来源：Journal of Applied Physics, 2009, 105(8): 083906.

DOI：10.1063/1.3098258

• etching
• ferrites
• garnets
• magnetic structure
• magnetic thin films
• magnons
• optimisation
• spin waves
• surface magnetism
• transmission lines
• yttrium compounds

One-dimensional magnonic crystals have been implemented as gratings of shallow grooves chemically etched into the surface of yttrium-iron-garnet films. Scattering of backward volume magnetostatic spin waves from such structures is investigated experimentally and theoretically. Well-defined rejection frequency bands are observed in transmission characteristics of the magnonic crystals. The loss inserted by the gratings and the rejection band bandwidths are studied as a function of the film thickness, the groove depth, the number of grooves, and the groove width. The experimental data are well described by a theoretical model based on the analogy of a spin-wave film waveguide with a microwave transmission line. Our study shows that magnonic crystals with required operational characteristics can be engineered by adjusting these geometrical parameters.

• 出版日期2009-4-15