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CONDENSED MATTER

Control of spin-wave Bragg resonances by the spin current in a magnonic crystal with platinum strips

M. A. Morozova^a, O. V. Matveev^a, N. D. Lobanov^a, D. V. Romanenko^a, А. M. Mednikov^b, S. A. Gusev^c, N. S. Gusev^c, S. A. Nikitov<sup>da

a</sup> Saratov State University, 410012, Saratov, Russia
^b Moscow Institute of Physics and Technology (National Research University), 141700, Dolgoprudnyi, Moscow region, Russia
^c Institute for Physics of Microstructures, Russian Academy of Sciences, 603950, Nizhny Novgorod, Russia
^d Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, 125009, Moscow, Russia

Abstract: The electric and magnetic frequency rearrangement of a Bragg resonance in the spectrum of spin waves in a magnonic crystal in the form of 100-nm-thick yttrium iron garnet film with attached 10-nm-thick platinum strips is reported. The effect of the spin current on the position of the Bragg band gap depends on the polarity of the voltage applied to the platinum strips. The positive voltage does not affect the band gap position, while the applied negative voltage lowers the band gap by about of 5 MHz. At frequencies outside the band gap, depending on the polarity of the voltage applied to platinum, either the enhancement or suppression of the spin wave is observed.

Received: 07.10.2024
Revised: 06.11.2024
Accepted: 10.11.2024

DOI: 10.31857/S0370274X24120208

 English version: Journal of Experimental and Theoretical Physics Letters, 2024, 120:12, 916–922