Search results for " seebeck effect"

showing 4 items of 4 documents

Spin transport across antiferromagnets induced by the spin Seebeck effect

2018

For prospective spintronics devices based on the propagation of pure spin currents, antiferromagnets are an interesting class of materials that potentially entail a number of advantages as compared to ferromagnets. Here, we present a detailed theoretical study of magnonic spin current transport in ferromagnetic-antiferromagnetic multilayers by using atomistic spin dynamics simulations. The relevant length scales of magnonic spin transport in antiferromagnets are determined. We demonstrate the transfer of angular momentum from a ferromagnet into an antiferromagnet due to the excitation of only one magnon branch in the antiferromagnet. As an experimental system, we ascertain the transport acr…

Phase transitionAngular momentumAcoustics and UltrasonicsMagnetoresistance530 PhysicsFOS: Physical sciencesantiferromagnetic spintroncis02 engineering and technology01 natural sciencesCondensed Matter::Materials Science0103 physical sciencesAntiferromagnetismddc:530010306 general physicsGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)Spin-½PhysicsCondensed Matter - Materials ScienceSpintronicsCondensed matter physicsMagnonMaterials Science (cond-mat.mtrl-sci)021001 nanoscience & nanotechnology530 PhysikCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsFerromagnetismspin Seebeck effectmagnon spin currentsCondensed Matter::Strongly Correlated Electrons0210 nano-technologyDen kondenserade materiens fysik
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Magnetic field control of the spin Seebeck effect

2015

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 suppressi…

PhysicsCondensed Matter - Materials ScienceField (physics)Condensed matter physicsSpin polarizationCondensed Matter - Mesoscale and Nanoscale PhysicsMagnonmagnetic field spin Seebeck effectMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter::Materials ScienceSpin wavepacs:75.40.MgMesoscale and Nanoscale Physics (cond-mat.mes-hall)Spin Hall effectSpin modelpacs:75.76.+jddc:530Condensed Matter::Strongly Correlated Electronspacs:75.30.DsSpin-½
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ANALISI SPERIMENTALE SUL RENDIMENTO DI UN GENERATORE TERMOELETTRICO A BASSI GRADIENTI TERMICI.

2008

solar energy electric energy seebeck effect thermoelectric generator
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Spin caloric transport from density-functional theory

2019

Spin caloric transport refers to the coupling of heat with spin transport. Its applications primarily concern the generation of spin currents and control of magnetisation by temperature gradients for information technology, known by the synonym spin caloritronics. Within the framework of ab initio theory, new tools are being developed to provide an additional understanding of these phenomena in realistic materials, accounting for the complexity of the electronic structure without adjustable parameters. Here, we review this progress, summarising the principles of the density-functional-based approaches in the field and presenting a number of application highlights. Our discussion includes th…

spintronicsMaterials scienceAcoustics and UltrasonicsSpintronicsCondensed matter physicsthermal spin torqueCaloric theory02 engineering and technologyPhysik (inkl. Astronomie)021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesspin Nernst effectSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialsspin Seebeck effectdensity functional calculations0103 physical sciencesspin caloritronicsDensity functional theoryCondensed Matter::Strongly Correlated Electronsmagneto-Seebeck effect010306 general physics0210 nano-technologySpin-½
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