Controlling acoustic waves using magnetoelastic Fano resonances

Abstract

We propose and analyze theoretically a class of energy-efficient magneto-elastic devices for analogue signal processing. The signals are carried by transverse acoustic waves while the bias magnetic field controls their scattering from a magneto-elastic 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 behaviour 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 further routes to enhance performance of the proposed devices.

arXiv comment5 pages, 4 figures

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Cited by in corpus (9)

• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Magnons Parametric Pumping in Bulk Acoustic Waves Resonator
• Dynamic Magnetoelastic Boundary Conditions and the Pumping of Phonons
• Nonreciprocal surface magnetoelastic dynamics
• Theory of the low-temperature longitudinal spin Seebeck effect
• Controlling the propagation of dipole-exchange spin waves using local inhomogeneity of the anisotropy
• Acoustic Frequency Multiplication and Pure Second Harmonic Generation of Phonons by Magnetic Transducers
• Quasinormal mode as a foundational framework for all electromagnetic Fano resonances
• Chiral Magnonic Resonators: Rediscovering the Basic Magnetic Chirality in Magnonics