Reconfigurable spin-wave platform based on interplay between nanodots and waveguide in hybrid magnonic crystal

• DOI: 10.48550/arxiv.2404.10493
• Publication Date: 2024-04-16
• Authors: Krzysztof Szulc; Mateusz Zelent; Maciej Krawczyk
• Keywords: Nanodot; Waveguide; Spin wave; Crystal (programming language)

We present a hybrid magnonic crystal composed of chain nanodots with strong perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction, positioned above permalloy waveguide. The study examines two different magnetization states in the nanodots: single-domain state an egg-shaped skyrmion state. Due to dipolar coupling between dot waveguide, strongly bound texture is formed system. Our numerical results show complex spin-wave spectra, combining effects periodicity, texture, hybridization propagating waves waveguide dot/skyrmion modes. systems are characterized by band gap sizes. For state, azimuthal modes confined domain wall lead formation flat bands at low frequencies, while higher frequencies we identify among them interacting waves, which can introduce additional non-Bragg gaps, as well isolated leading states. On other hand, system offers wide range where spin predominantly Thus, shows that proposed crystals have many distinct functionalities, highlighting their reconfigurable potential, magnon-magnon couplings, mode localization, overlapping waves. This opens up potential applications analog quantum magnonics, filtering, establishment neural networks.