Spin waves in meander shaped YIG film: Toward 3D magnonics
V. K. Sakharov, E. N. Beginin, Y. V. Khivintsev, А. V. Sadovnikov, A. I. Stognij, Y. A. Filimonov, С. А. Никитов
Abstract
We report on the experimental observation of a spin wave (SW) propagation in a magnetic film lying on a developed surface—a three-dimensional (3D) magnonic structure. The 3D magnonic structure was fabricated by deposition of a 180 nm thick yttrium iron garnet film on the patterned substrate with a one-dimensional array of 1.5 μm deep grooves with the period of 20 μm using ion beam sputtering. We experimentally explored SW propagation in such a periodic structure for Bragg and Laue geometries. Transmission characteristics showed that for the Bragg geometry, the examined structure works more like a system of coupled resonators that are formed by the flat segments of the 3D structure, whereas for the Laue geometry, the features related to a formation of width SW modes and to the discrete diffraction of the SW were observed.