Spin waves in meander shaped YIG film: Toward 3D magnonics

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...

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Bibliographic Details
Published in:Applied physics letters 2020-07, Vol.117 (2)
Main Authors: Sakharov, V. K., Beginin, E. N., Khivintsev, Y. V., Sadovnikov, A. V., Stognij, A. I., Filimonov, Y. A., Nikitov, S. A.
Format: Article
Language:English
Subjects:
Applied physics
Grooves
Ion beam sputtering
Magnetic films
Magnons
Periodic structures
Substrates
Wave propagation
Yttrium
Yttrium-iron garnet
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Summary: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   μ m deep grooves with the period of 20   μ m 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.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0013150