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Micromagnetic Modeling of Spin-Wave Excitations in Corrugated YIG Films

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Abstract

In this paper, we study the features of the spin-wave excitation spectrum in a YIG film with a thickness of 0.4 μm and a magnetization of 1.1 kG corrugated due to the periodic relief of the substrate in the form of grooves with a width of 10 μm and a depth of 0.5 μm, with sloping walls, and a period of 20 μm by micromagnetic modeling. Calculations performed for the orientations of the external magnetic field applied in the film plane along (θ = 0) and across (θ = 90°) grooves show that film shape anisotropy leads to quantization of the spectrum and localization of the spin-wave excitations in various parts of the sample. In this case, the spatial distribution of the magnetization amplitude at frequencies in the spectrum at θ = 90° can be characterized by several spatial scales, differing by orders of magnitude. This is explained by the strong inhomogeneity of the ground state on the walls of the grooves at θ = 90°, which leads to the effective excitation of the short-wave part of the spectrum of spin waves in a periodic structure according to the Schlömann mechanism.

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Funding

The work was performed as part of the State Project no. 0030-2019-0013 “Spintronics” and was partially supported by the Russian Foundation for Basic Research, project no. 18-57-00008.

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Authors and Affiliations

  1. Saratov Branch of Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, 410019, Saratov, Russia

    V. K. Sakharov, Y. V. Khivintsev, G. M. Dudko, S. L. Vysotskii & Y. A. Filimonov

  2. Chernyshevsky Saratov National Research State University, 410012, Saratov, Russia

    Y. V. Khivintsev, S. L. Vysotskii & Y. A. Filimonov

Authors
  1. V. K. Sakharov
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  2. Y. V. Khivintsev
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  3. G. M. Dudko
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  4. S. L. Vysotskii
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  5. Y. A. Filimonov
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Correspondence to V. K. Sakharov.

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The authors declare that they have no conflicts of interest.

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Translated by A. Ivanov

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Sakharov, V.K., Khivintsev, Y.V., Dudko, G.M. et al. Micromagnetic Modeling of Spin-Wave Excitations in Corrugated YIG Films. Phys. Solid State 61, 1602–1608 (2019). https://doi.org/10.1134/S1063783419090257

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  • DOI: https://doi.org/10.1134/S1063783419090257

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