This article is cited in 2 papers

XXVI International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 14 - March 17, 2022
Magnetism

Particularities of spin wave propagation in magnonic crystals with nonuniform magnetization distribution across the thickness

V. K. Sakharov^a, Yu. V. Khivintsev^a, G. M. Dudko^a, A. S. Dzhumaliev^a, S. L. Vysotsky^a, A. I. Stognij^b, Yu. A. Filimonov<sup>a

a</sup> Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences, Saratov, Russia
^b Scientific-Practical Materials Research Centre of NAS of Belarus, Minsk, Belarus

Abstract: With the help of micromagnetic modeling, we considered particularities of dispersions and amplitude-frequency response of spin waves in a magnonic crystal (MC) formed by etching an array of grooves in the surface of yttrium iron garnet film having linear distribution of magnetization across the thickness from 1.7 kG at the upper surface till 2.02 kG at the bottom. For the geometry of surface magnetostatic spin waves (MSSW), it is shown that nonuniformity of magnetization distribution across the thickness leads to the appearance of frequency regions in the MC spectrum where MSSW propagation is unidirectional and, as the consequence, does not have Bragg resonances. It was also demonstrated that the MC spectrum is determined by the choice of surface used for the formation of the array of grooves.

Keywords: spin wave, micromagnetic modelling, film of yttrium iron garnet, magnonic crystal.

Received: 29.04.2022
Revised: 29.04.2022
Accepted: 12.05.2022

DOI: 10.21883/FTT.2022.09.52815.11HH

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