XXIX International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 10-14, 2025
Magnetism, spintronics

Spin wave propagation in a tangentially magnetized Lu$_{2.1}$Bi$_{0.9}$Fe$_5$O$_{12}$ film

S. L. Vysotsky^ab, M. E. Seleznev^a, G. M. Amahanov^c, Yu. V. Nikulin^ab, V. K. Sakharov<sup>ab

a</sup> Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences
^b Saratov State University
^c Yuri Gagarin State Technical University of Saratov

Abstract: The propagation of surface and backward volume magnetostatic waves in a saturated ferrite garnet film of the composition Lu$_{2.1}$Bi$_{0.9}$Fe$_5$O$_{12}$ is investigated. Comparison of the experimentally obtained dispersion dependences with the results of numerical modeling allows us to conclude that the saturation magnetization is non-uniformly distributed across the film thickness. It is shown that in the low-frequency region of the spectrum, the losses due to propagation of surface magnetostatic waves are comparable with a similar parameter in a yttrium iron garnet film obtained using liquid-phase epitaxy. In the range of magnetization field values 0 $<H<$ 400 Oe, the possibility of observing spin-wave excitations of the domain structure is shown.

Keywords: garnet film of composition Lu$_{2.1}$Bi$_{0.9}$Fe$_5$O$_{12}$, surface and backward volume magnetostatic waves, spin-wave excitations of the domain structure.

Received: 06.03.2025
Revised: 06.03.2025
Accepted: 05.05.2025

DOI: 10.61011/FTT.2025.07.61186.1HH-25

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