Tunable power-phase distributions in a phonon-magnon-coupled magnon microwave antenna for reservoir computing
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Accepted Version
Date
2024-11-26
Authors
Samanta, Arindam
Roy, Saibal
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Publisher
American Physical Society
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Abstract
Exploring the power and phase profiles of spin waves not only enhances our fundamental understanding of magnetic materials but also opens up avenues for energy-efficient technologies such as spintronics, magnonics, and potentially reservoir computing. Here, we present the power-phase distributions and their tunability of a surface-acoustic-wave-driven “magnon microwave antenna” (MMA), comprising patterned arrays of magnetostrictive nanomagnets embedded in piezoelectric heterostructures. The MMA generates tunable microwave frequencies without external bias fields, thanks to phonon-magnon coupling, producing multimode microwave frequencies with nonvolatile spin textures. A comprehensive static magnetic study elucidates the crucial role of the demagnetization energy distribution, rather than its overall magnitude in magnetization reversal processes. Additionally, functional tunability could be achieved through amplitude-dependent training using various combinations of nanowire and nanodot dimensions, topologies, material properties, and array configurations. The nonvolatile nature of the spin textures generated in the MMA under bias-field-free conditions is promising for energy-efficient logic and low-power computing applications. Thus this work introduces a novel alternative approach, paving the way to utilize these MMAs for on-chip reservoir computing, where amplitude varies at the operating frequency.
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Keywords
Magnons , Phonons , Physics of computation , Spin waves , Ferromagnets , Nanostructures , Micromagnetic modeling , Microwave techniques
Citation
Samanta, A. and Roy, S. (2024) 'Tunable power-phase distributions in a phonon-magnon-coupled magnon microwave antenna for reservoir computing', Physical Review Applied, 22(5), 054076 (18pp). https://doi.org/10.1103/PhysRevApplied.22.054076
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© 2024, American Physical Society. All rights reserved.