Journal
APPLIED PHYSICS LETTERS
Volume 115, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5115387
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Funding
- Engineering and Physical Sciences Research Council of the United Kingdom [EP/L015331/1]
- European Union's Horizon 2020 research and innovation program under Marie Skodowska-Curie Grant [644348]
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We propose and analyze theoretically a class of energy-efficient magnetoelastic devices for analog signal processing. The signals are carried by transverse acoustic waves while the bias magnetic field controls their scattering from a magnetoelastic slab. By tuning the bias field, one can alter the resonant frequency at which the propagating acoustic waves hybridize with the magnetic modes, and thereby control transmission and reflection coefficients of the acoustic waves. The scattering coefficients exhibit Breit-Wigner/Fano resonant behavior akin to inelastic scattering in atomic and nuclear physics. Employing oblique incidence geometry, one can effectively enhance the strength of magnetoelastic coupling, and thus countermand the magnetic losses due to the Gilbert damping. We apply our theory to discuss potential benefits and issues in realistic systems and suggest routes to enhance the performance of the proposed devices.
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