Laser-induced spatiotemporal dynamics of magnetic films

Abstract

We present a theory for the coherent magnetization dynamics induced by a focused ultrafast laser beam in magnetic films, taking into account nonthermal (inverse Faraday effect) and thermal (heating) actuation. The dynamic conversion between spin waves and phonons is induced by the magnetoelastic coupling that allows efficient propagation of angular momentum. The anisotropy of the magnetoelastic coupling renders characteristic angle dependences of the magnetization propa-gation that are strikingly different for thermal and nonthermal actuation.

5+3 pages

References in corpus (4)

• Critical suppression of spin Seebeck effect by magnetic fields
• The effect of the magnon dispersion on the longitudinal spin Seebeck effect in yttrium iron garnets (YIG)
• Ultra-fast spin dynamics: the effect of colored noise
• Resonant driving of magnetization precession in a ferromagnetic layer by coherent monochromatic phonons

Cited by in corpus (34)

• Hybrid magnonics: physics, circuits and applications for coherent information processing
• Exciton-Coupled Coherent Magnons in a 2D Semiconductor
• Magnon Polarons in the Spin Seebeck Effect
• Magnon-polaron transport in magnetic insulators
• Direct observation of magnon-phonon coupling in yttrium iron garnet
• Discovery of coexisting Dirac and triply degenerate magnons in a three-dimensional antiferromagnet
• Nonlocal magnon-polaron transport in yttrium iron garnet
• Squeezing Microwaves by Magnetostriction
• Topological Magnetoelastic Excitations in Non-Collinear Antiferromagnets
• Spin and spin current -- From fundamentals to recent progress
• Unveiling a Pump-Induced Magnon Mode via its Strong Interaction with Walker Modes
• Observation of magnon-polarons in a uniaxial antiferromagnetic insulator
• Frequency and wavenumber selective excitation of spin waves through coherent energy transfer from elastic waves
• Direct observation of topological magnon polarons in a multiferroic material
• Boltzmann approach to the longitudinal spin Seebeck effect
• Room temperature and low-field resonant enhancement of spin Seebeck effect in partially compensated magnets
• Finite temperature magnon spectra in yttrium iron garnet from mean field approach in tight-binding model
• Evidence for magnon-phonon coupling in the topological magnet Cu${}_3$TeO${}_6$
• Magnon polarons in the spin Peltier effect
• Double accumulation and anisotropic transport of magneto-elastic bosons in yttrium iron garnet films
• Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial Bi${}_x$Y${}_{3-x}$Fe${}_5$O${}_{12}$ films
• Facet-dependent magnon-polarons in epitaxial ferrimagnetic Fe3O4 thin films
• Magnon Polarons induced by a magnetic field gradient
• Optimizing the magnon-phonon cooperativity in planar geometries
• Excitation of high-frequency magnon modes in magnetoelastic films by short strain pulses
• Excitation and coherent control of magnetization dynamics in magnetic tunnel junctions using acoustic pulses
• Dynamic self-organisation and pattern formation by magnon-polarons
• Magnon hybridization in ferrimagnetic heterostructures
• Theory of spin and lattice wave dynamics excited by focused laser pulses
• 180-degree phase shift of magnetoelastic waves observed by phase-resolved spin-wave tomography
• Nonlinear effects in the propagation of optically generated magnetostatic volume mode spin waves
• Two-dimensional dispersion of magnetostatic volume spin waves
• An Effective Field Theory of Magneto-Elasticity
• Ultra-high frequency magnetic resonance through strain-spin coupling in perpendicular magnetic multi-layers