Chiral excitation of spin waves in ferromagnetic films

Abstract

We theoretically investigate the interlayer dipolar and exchange couplings for an array of metallic magnetic nanowires grown on top of an extended ultrathin yttrium iron garnet film. The calculated interlayer dipolar coupling agrees with observed anticrossings [Chen \emph{et al.}, Phys. Rev. Lett. \textbf{120}, 217202 (2018)], concluding that the interlayer exchange coupling is suppressed by a spacer layer between the nanowires and film. The Kittel mode in the nanowire array couples chirally to spin waves in the film, even though Damon-Eshbach surface modes do not exist. The chirality is suppressed when the interlayer exchange coupling becomes strong.

arXiv comment13 pages, 5 figures

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Cited by in corpus (27)

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• Magnetic resonance imaging of spin-wave transport and interference in a magnetic insulator
• Resources of nonlinear cavity magnonics for quantum information
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Perspective: non-Hermitian physics in magnetic systems
• Chiral Pumping of Spin Waves
• Observation and control of hybrid spin-wave-Meissner-current transport modes
• Magnon Accumulation in Chirally Coupled Magnets
• Unidirectional Pumping of Phonons by Magnetization Dynamics
• Chiral coupling of magnons in waveguides
• Efficient Gating of Magnons by Proximity Superconductors
• Magnon Trap by Chiral Spin Pumping
• Towards a quantum interface between spin waves and paramagnetic spin baths
• Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers
• Nonreciprocal Emergence of Hybridized Magnons in magnetic thin Films
• Nonreciprocal surface magnetoelastic dynamics
• Non-Contact Spin Pumping by Microwave Evanescent Fields
• Spin-Wave Doppler Shift by Magnon Drag in Magnetic Insulators
• Local non-linear excitation of sub-100 nm bulk-type spin waves by edge-localized spin waves in magnetic films
• Bias-free reconfigurable magnonic phase shifter based on a spin-current controlled ferromagnetic resonator
• Electromagnetic Proximity Effect: Superconducting Magnonics and Beyond
• Wideband wide-field imaging of spin-wave propagation using diamond quantum sensors
• Nonreciprocal Spin Waves Driven by Left-Hand Microwaves
• Quantitative imaging of nonlinear spin-wave propagation using diamond quantum sensors
• Resonant subwavelength control of the phase of spin waves reflected from a ferromagnetic film edge