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Generation of Microwaves With Tuneable Frequencies in Ultracompact “Magnon Microwave Antenna” via Phonon-Magnon-Photon Coupling | IEEE Journals & Magazine | IEEE Xplore

Generation of Microwaves With Tuneable Frequencies in Ultracompact “Magnon Microwave Antenna” via Phonon-Magnon-Photon Coupling


Abstract:

Here, we report a “magnon microwave antenna” (MMA) for the generation of microwaves with tuneable frequencies, based on modulation of confined spin waves (SWs) in the pat...Show More

Abstract:

Here, we report a “magnon microwave antenna” (MMA) for the generation of microwaves with tuneable frequencies, based on modulation of confined spin waves (SWs) in the patterned array of magnetostrictive nanomagnets/piezoelectric heterostructures caused by the surface acoustic waves (SAWs). A SAW launched on a piezoelectric substrate produces a periodic strain within the nanomagnets patterned on it, which, in turn, stimulates magnetization precession resulting in different magneto-dynamical resonance modes in the array of nanomagnets with a rich SW texture. The generated SWs (magnons) further interact with the EM radiation (photons) at the SAW frequency. The phonon-magnon-photon coupling in the patterned array of nanowires (NWs) generates a 0.56 GHz microwave frequency with a 13.9 MHz linewidth and a {Q} -factor of 40, while that in a matrix of nanodots (having same overall area) provides tuneable frequencies leading up to 30 GHz with a linewidth of 59.1 MHz and an enhanced {Q} -factor of 439; having nonvolatile spin textures in both the cases. The generated nonvolatile spin textures of the NWs/nanodots can also be useful in energy-efficient logic and low-power computing applications.
Published in: IEEE Transactions on Electron Devices ( Volume: 70, Issue: 1, January 2023)
Page(s): 335 - 342
Date of Publication: 05 December 2022

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