Propagation of Thermally Induced Magnonic Spin Currents

Abstract

The propagation of magnons in temperature gradients is investigated within the framework of an atomistic spin model with the stochastic Landau-Lifshitz-Gilbert equation as underlying equation of motion. We analyze the magnon accumulation, the magnon temperature profile as well as the propagation length of the excited magnons. The frequency distribution of the generated magnons is investigated in order to derive an expression for the influence of the anisotropy and the damping parameter on the magnon propagation length. For soft ferromagnetic insulators with low damping a propagation length in the range of some $\mu$m can be expected for exchange driven magnons.

References in corpus (10)

• Spin Caloritronics
• Spin Seebeck insulator
• Theory of magnon-driven spin Seebeck effect
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Linear-response theory of spin Seebeck effect in ferromagnetic insulators
• Intrinsic Spin Seebeck Effect in Au/YIG
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• Landau-Lifshitz theory of the longitudinal spin Seebeck effect
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• Picosecond spin Seebeck effect
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• Magnetic field control of the spin Seebeck effect
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Domain wall motion by localized temperature gradients
• Spin Seebeck and Spin Nernst Effects of Magnons in Noncollinear Antiferromagnetic Insulators
• Spin transport across antiferromagnets induced by the spin Seebeck effect
• Spin Seebeck effect at microwave frequencies
• Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: competition of angular momentum transfer and entropic torque
• Thermographic measurements of spin-current-induced temperature modulation in metallic bilayers
• Microwave-induced spin currents in ferromagnetic-insulator|normal-metal bilayer system
• Thermodynamic Magnon Recoil for Domain Wall Motion
• Rectifying full-counting statistics in a spin Seebeck engine
• On the longitudinal spin current induced by a temperature gradient in a ferromagnetic insulator
• Exceptional sign changes of the non-local spin Seebeck effect in antiferromagnetic hematite
• High-frequency magnon excitation due to femtosecond spin-transfer torques
• Thermally induced magnonic spin current, thermomagnonic torques and domain wall dynamics in the presence of Dzyaloshinskii-Moriya interaction
• Thermally induced magnon accumulation in two-sublattice magnets
• Transient spin dynamics in a single-molecule magnet
• Spin-wave localization in disordered magnets
• Enhancement in Thermally Generated Spin Voltage at Pd/NiFe${}_2$O${}_4$ Interfaces by the Growth on Lattice-Matched Substrates
• Spin Seebeck effect in Y-type hexagonal ferrite thin films
• Spin Seebeck effect and ballistic transport of quasi-acoustic magnons in room-temperature yttrium iron garnet films
• Reconstruction of an effective magnon mean free path distribution from spin Seebeck measurements in thin films
• Swift thermal steering of domain walls in ferromagnetic MnBi stripes
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• Transport properties of spin superfluids: comparing easy-plane ferro- and antiferromagnets
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Scattering theory of transport through disordered magnets
• A model for coupled $4f-3d$ magnetic spectra: a neutron scattering study of the Yb$-$Fe hybridisation in Yb${}_3$Fe${}_5$O${}_{12}$
• Scaling of the thermally induced sign inversion of longitudinal spin Seebeck effect in a compensated ferrimagnet: Role of magnetic anisotropy