Magnetic field control of the spin Seebeck effect

Abstract

The origin of the suppression of the longitudinal spin Seebeck effect by applied magnetic fields is studied. We perform numerical simulations of the stochastic Landau-Lifshitz-Gilbert equation of motion for an atomistic spin model and calculate the magnon accumulation in linear temperature gradients for different strengths of applied magnetic fields and different length scales of the temperature gradient. We observe a decrease of the magnon accumulation with increasing magnetic field and we reveal that the origin of this effect is a field dependent change of the frequency distribution of the propagating magnons. With increasing field the magnonic spin currents are reduced due to a suppression of parts of the frequency spectrum. By comparison with measurements of the magnetic field dependent longitudinal spin Seebeck effect in YIG thin films with various thicknesses, we find that our model describes the experimental data very well, demonstrating the importance of this effect for experimental systems.

References in corpus (8)

• Direct electronic measurement of the spin Hall effect
• Theory of magnon-driven spin Seebeck effect
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• 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)
• Simultaneous detection of the spin-Hall magnetoresistance and the spin-Seebeck effect in Platinum and Tantalum on Yttrium Iron Garnet
• Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures
• Propagation of Thermally Induced Magnonic Spin Currents

Cited by in corpus (31)

• Thermoelectric generation based on spin Seebeck effects
• Magnon Polarons in the Spin Seebeck Effect
• Critical suppression of spin Seebeck effect by magnetic fields
• Origin of the thickness-dependent low-temperature enhancement of spin Seebeck effect in YIG films
• Magnetic field dependence of the magnon spin diffusion length in the magnetic insulator yttrium iron garnet
• Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Magnon mode selective spin transport in compensated ferrimagnets
• Thermographic measurements of the spin Peltier effect in metal/yttrium-iron-garnet junction systems
• Magnon-mediated spin current noise in ferromagnet$|$non-magnetic conductor hybrids
• Spin transport across antiferromagnets induced by the spin Seebeck effect
• Spin transport in multilayer systems with fully epitaxial NiO thin films
• Boltzmann approach to the longitudinal spin Seebeck effect
• Thermal generation of spin current in epitaxial CoFe2O4 thin films
• Thermodynamic transport theory of spin waves in ferromagnetic insulators
• Probing short-range magnetic order in a geometrically frustrated magnet by spin Seebeck effect
• Experimental proof of the reciprocal relation between spin Peltier and spin Seebeck effects in a bulk YIG/Pt bilayer
• Differences in the magnon diffusion length for electrically and thermally driven magnon currents in Y${}_3$Fe${}_5$O${}_{12}$
• Magnetic-field-induced suppression of spin Peltier effect in Pt/${\mathrm{Y}}_3\mathrm{F}{\mathrm{e}}_5{\mathrm{O}}_{12}$ system at room temperature
• Temperature dependence of the Spin Seebeck effect in a mixed valent manganite
• Probing length-scale separation of thermal and spin currents by nanostructuring YIG
• 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
• Spin Seebeck effect in Y-type hexagonal ferrite thin films
• Role of magnons and the size effect in heat transport through an insulating ferromagnet/insulator interface
• Skyrmion lattice hosted in synthetic antiferromagnets and helix modes
• Transport between metals and magnetic insulators
• Thermoelastic enhancement of the magnonic spin Seebeck effect in thin films and bulk samples
• Cryogenic spin Seebeck effect
• Interplay of Wave Localization and Turbulence in Spin Seebeck Effect
• Scaling of the thermally induced sign inversion of longitudinal spin Seebeck effect in a compensated ferrimagnet: Role of magnetic anisotropy