Features of Spin Wave Propagation in a Ring YIG Microresonator with Non-Uniform Internal Magnetic Field Distribution

Abstract

The study demonstrates fundamental aspects of controlling the type and propagation of spin waves in a ring microresonator made of yttrium iron garnet (Y₃Fe₅O₁₂) by changing the spatial orientation of the external magnetic field. Using micromagnetic modeling in the MuMax3 software package, which accounts for all fundamental interactions in magnetic materials, it was established that the direction of the applied magnetic field (along the X or Y axis of the structure) determines the excitation of different types of magnetostatic waves. When the field was oriented along the X axis, excitation of surface magnetostatic waves (MSSW) was observed, while field configuration along the Y axis led to the generation of backward volume magnetostatic waves (BVMSW). The significant differences in phase patterns and spatial distributions of the internal magnetic field were due to fundamentally different dispersion characteristics of these wave types, as well as pronounced spatial inhomogeneity of the effective magnetic field within the resonator volume. It was shown that the orientation of the external magnetic field determines the configuration of equilibrium magnetization and the distribution of internal magnetic fields, which is an important factor influencing spin wave propagation. The obtained results are of key importance for the development of magnonic logic devices combining signal transmission, frequency filtering, and resonant amplification functions. The main advantage of the studied configuration lies in the effective combination of signal transmission and selective resonant amplification in a single structure, opening new possibilities for creating energy-efficient information processing systems based on controlled spin wave propagation.

Speaker

Yasnev Nikita Yuryevich
Saratov National Research State University named after N.G. Chernyshevsky
Russia

Discussion

Ask question