SPIN WAVES PROPAGATION IN A SYSTEM OF LATERALLY COUPLED INTERFEROMETERS

Abstract

The development of technologies for structuring thin-film magnetic micro- and nanostructures has opened up new opportunities for studying the mechanisms, methods for excitation and control of spin waves (SW) in magnetic materials. SW properties can be controlled in various ways: by changing the local properties of magnonic structures; variation of the shape of spin-wave structures; by changing the orientation and magnitude of the bias field. As was shown in the works, the effects of dipole coupling of spin waves in lateral strips lead to periodic power transfer between the strips, while the spin-wave coupling can be used to implement modes of spatial frequency selection of SWs. A signal encoded in phase or amplitude can be used as a binary code in integrated spin computing devices. The interferometer was 1.5 mm wide and 10 mm long. The width of the waveguide channel was 0.5 mm. The saturation magnetization of the YIG film, from which the structure under study was formed, was 1.39e-5 A/m; The magnitude of the constant external magnetic field is 1480-1500 Oe. The direction of the external magnetic field is chosen so that surface magnetostatic spin waves are excited in the waveguide structure. To describe the physical processes of SW propagation dynamics, micromagnetic modeling was carried out in the MuMax3 program based on the numerical solution of the Landau-Lifshitz-Gilbert equation. The conducted studies of the propagation of spin waves in a system of laterally coupled interferometers can be used to construct logical networks based on magnon principles.
This work was supported by RSF (#20-79-10191)

Speaker

Alexandr Martyshkin
Saratov State University
Russia

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