Spin wave filtration by resonances in the sidewalls of corrugated yttrium-iron garnet films

•Spin wave resonances in the sidewalls of corrugated magnetic films causes band gaps.•Frequency position of the “band gap due sidewall” grows with the corrugation depth.•“Band gap due sidewall” exists independently of Bragg resonances.•“Band gap due sidewall” shows ten times larger attenuation than...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2022-03, Vol.545, p.168786, Article 168786
Main Authors: Sakharov, Valentin, Khivintsev, Yuri, Vysotskii, Sergey, Stognij, Alexander, Filimonov, Yuri, Sadovnikov, Alexandr, Beginin, Evgeny, Nikitov, Sergey
Format: Article
Language:English
Subjects:
Corrugated yttrium iron garnet film
Corrugation
Dipoles
Dispersion characteristic
Energy gap
Iron
Magnons
Micromagnetic simulation
Spin wave
Thickness
Transmission characteristic
Yttrium
Yttrium-iron garnet
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Summary:•Spin wave resonances in the sidewalls of corrugated magnetic films causes band gaps.•Frequency position of the “band gap due sidewall” grows with the corrugation depth.•“Band gap due sidewall” exists independently of Bragg resonances.•“Band gap due sidewall” shows ten times larger attenuation than Bragg resonances. In this work, the particularities of the spin wave (SW) excitations in corrugated yttrium-iron garnet (YIG) films with a thickness of 0.2 μm and a corrugation period of 20 μm were studied by micromagnetic simulations. Strong influence of the corrugation depth, changing from 0 to 0.5 μm, on SW dispersion, transmission and eigenmode spectrum was shown. Formation of a bandgap resulting from the spin-wave resonances in the sidewalls of the corrugated YIG film was discovered in the SW dispersion and transmission spectrum in addition to the Bragg bandgaps and dipole-exchange resonance.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2021.168786