Observation of huge thermal spin currents in magnetic multilayers

Abstract

Thermal spin pumping constitutes a novel mechanism for generation of spin currents; however their weak intensity constitutes a major roadblock for its usefulness. We report a phenomenon that produces a huge spin current in the central region of a multilayer system, resulting in a giant spin Seebeck effect in a structure formed by repetition of ferromagnet/metal bilayers. The result is a consequence of the interconversion of magnon and electron spin currents at the multiple interfaces. This work opens the possibility to design thin film heterostructures that may boost the application of thermal spin currents in spintronics.

References in corpus (10)

• Direct electronic measurement of the spin Hall effect
• Spin Seebeck insulator
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Theory of magnon-driven spin Seebeck effect
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• Spin convertance at magnetic interfaces
• Proximity-free enhancement of anomalous Nernst effects in metallic multilayers
• Magnon-drag thermopile
• Spin Seebeck Power Conversion

Cited by in corpus (26)

• Thermoelectric generation based on spin Seebeck effects
• Magnon Valve Effect Between Two Magnetic Insulators
• Picosecond spin Seebeck effect
• Spin Seebeck Power Conversion
• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers
• Thermoelectric performance of spin Seebeck effect in Fe3O4/Pt-based thin film heterostructures
• Non-equilibrium thermodynamics of the spin Seebeck and spin Peltier effects
• Above-room-temperature giant thermal conductivity switching in spintronic multilayer
• Observation of spin Seebeck contribution to the transverse thermopower in Ni-Pt and MnBi-Au bulk nanocomposites
• Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures
• Thermographic measurements of spin-current-induced temperature modulation in metallic bilayers
• Spincaloritronic measurements: a round robin comparison of the longitudinal spin Seebeck effect
• Fundamentals and advances in transverse thermoelectrics
• Experimental proof of the reciprocal relation between spin Peltier and spin Seebeck effects in a bulk YIG/Pt bilayer
• 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
• Fabrication of yttrium-iron-garnet/Pt multilayers for the longitudinal spin Seebeck effect
• Thermally induced magnon accumulation in two-sublattice magnets
• Spin Seebeck effect in quantum magnet Pb2V3O9
• Spin Seebeck effect and magnon diffusion length in ${\mathbf{Fe}}_3{\mathbf{O}}_4$
• Spin Seebeck effect in a simple ferromagnet near Tc: A Ginzburg-Landau approach
• Facet-dependent magnon-polarons in epitaxial ferrimagnetic Fe3O4 thin films
• Ultrafast Measurements of the Interfacial Spin Seebeck Effect in Au and Rare-Earth Iron Garnet Bilayers
• Non-equilibrium Magnon Engineering Enabling Significant Thermal Transport Modulation
• Magnon-Driven Magnetothermal Transport in Magnetic Multilayers
• Spin caloritronics: History and future prospects of experiments