Excitation of exchange spin waves in a two-layer ferrite-ferrite structure

V. V. Tikhonov, V. A. Gubanov, I. O. Filchenkov, A. V. Sadovnikov

Saratov State University, Saratov, Russia

Abstract: The possibility of intense radiation of short-wave exchange spin waves excited in a thin transition layer at the internal boundary of a bilayer ferrite-ferrite structure is shown. Modelling of radiation processes has been exemplified by a tangentially magnetized bilayer film of ferric-yttrium garnet. It was found that the radiation of exchange spin waves has one-way character. The waves were radiated into the layer with decreased magnetization. Their group velocities were an order of magnitude lower than sound velocity in iron-yttrium garnet. Obtained results may be useful for creation of miniature controllable delay line on exchange spin waves.

Keywords: spin waves, ferrite, iron yttrium garnet, delay line.

Received: 30.12.2022
Revised: 06.02.2023
Accepted: 08.02.2023

DOI: 10.21883/PJTF.2023.08.55130.19473

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