Driving magnetization dynamics in an on-demand magnonic crystal by magneto-elastic interaction

Abstract

Using spatial light interference of ultrafast laser pulses, we generate a lateral modulation in the magnetization profile of an otherwise uniformly magnetized film, whose magnetic excitation spectrum is monitored via the coherent and resonant interaction with elastic waves. We find an unusual dependence of the magnetoelastic coupling as the externally applied magnetic field is angle- and field-tuned relative to the wave vector of the magnetization modulation, which can be explained by the emergence of spatially inhomogeneous spin-wave modes. In this regard, the spatial light interference methodology can be seen as a user-configurable, temporally windowed, on-demand magnonic crystal, potentially of arbitrary two-dimensional shape, which allows control and selectivity of the spatial distribution of spin waves. Calculations of spin waves using a variety of methods, demonstrated here using the plane-wave method and micromagnetic simulation, can identify the spatial distribution and associated energy scales of each excitation, which opens the door to a number of excitation methodologies beyond our chosen elastic wave excitation.

References in corpus (21)

• The design and verification of Mumax3
• The building blocks of magnonics
• Acoustically driven ferromagnetic resonance
• Surface Acoustic Wave-Driven Ferromagnetic Resonance in Nickel Thin Films: Theory and Experiment
• Surface acoustic wave driven ferromagnetic resonance in (Ga,Mn)(As,P) epilayers
• Spin-wave logic devices based on isotropic forward volume magneto-static waves
• Traveling surface spin-wave resonance spectroscopy using surface acoustic waves
• Magnonic spin-wave modes in CoFeB antidot lattices
• Magnonic band structure in a Co/Pd stripe domain system investigated by Brillouin light scattering and micromagnetic simulations
• Ultrafast Magnetoelastic Probing of Surface Acoustic Transients
• Spin wave nonreciprocity and magnonic band structure in thin permalloy film induced by dynamical coupling with an array of Ni stripes
• Parametric frequency mixing in the magneto-elastically driven FMR-oscillator
• Magnonic crystals - prospective structures for shaping spin waves in nanoscale
• Spin waves in one-dimensional bi-component quasicrystals
• Broadband magnetoelastic coupling in magphonic crystals for high-frequency nanoscale spin wave generation
• Analytical expression of the magneto-optical Kerr effect and Brillouin light scattering intensity arising from dynamic magnetization
• Coupled mode theory for the acoustic wave and spin wave interaction in the magphonic crystals: Propagating magnetoelastic waves
• The role of the internal demagnetizing field in a surface-modulated magnonic crystal
• Spatio-temporal coherent control of thermal excitations in solids
• Anomalous Nernst effect on the nanometer scale: Exploring three-dimensional temperature gradients in magnetic tunnel junctions
• Geometrical complexity of the antidots unit cell effect on the spin wave excitations spectra

Cited by in corpus (8)

• Magnetization Dynamics of Nanoscale Magnetic Materials: A Perspective
• Advances in coherent coupling between magnons and acoustic phonons
• Optical excitation of propagating magnetostatic waves in an epitaxial Galfenol film by an ultrafast magnetic anisotropy change
• Anatomy of ultrafast quantitative magneto-acoustics in freestanding nickel thin films
• Reversible tuning of omnidirectional band gaps in two-dimensional magnonic crystals by magnetic field and in-plane squeezing
• Magnon-polaron formation in XXZ quantum Heisenberg chains
• Spin-wave localization on phasonic defects in one-dimensional magnonic quasicrystal
• The studies on phonons and magnons in (Ni80Fe20/Au/Co/Au) multilayers of different number of repetitions