Observation of the spin Seebeck effect in epitaxial Fe3O4 thin films

Abstract

We report the first experimental observation of the spin Seebeck effect in magnetite thin films. The signal observed at temperatures above the Verwey transition is a contribution from both the anomalous Nernst (ANE) and spin Seebeck effects (SSE). The contribution from the ANE of the Fe3O4 layer to the SSE is found to be negligible due to the resistivity difference between Fe3O4 and Pt layers. Below the Verwey transition the SSE is free from the ANE of the ferromagnetic layer and it is also found to dominate over the ANE due to magnetic proximity effect on the Pt layer.

13 pages, 3 figures

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• Spin Seebeck insulator
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Theory of magnon-driven spin Seebeck effect
• Theory of the Spin Seebeck Effect
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• Thermoelectric Effects in Magnetic Nanostructures
• Magnon-drag thermopile
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• Interface-Induced Phenomena in Magnetism
• Theory of the Spin Seebeck Effect
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• Antiferromagnetic spin Seebeck Effect
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• Large anomalous Nernst effect in thin films of the Weyl semimetal Co2MnGa
• The effect of the magnon dispersion on the longitudinal spin Seebeck effect in yttrium iron garnets (YIG)
• Proximity-free enhancement of anomalous Nernst effects in metallic multilayers
• Enhanced DC Spin Pumping into a Fluctuating Ferromagnet near Tc
• Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures
• Observation of huge thermal spin currents in magnetic multilayers
• Physical characteristics and cation distribution of NiFe2O4 thin films with high resistivity prepared by reactive co-sputtering
• Influence of heat flow directions on Nernst effects in Py/Pt bilayers
• Thickness dependence of the anomalous Nernst effect and the Mott relation of Weyl-semimetal Co2MnGa thin films
• Nonlocal magnon spin transport in NiFe${}_2$O${}_4$ thin films
• Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers
• Unambiguous separation of the inverse spin Hall and anomalous Nernst Effects within a ferromagnetic metal using the spin Seebeck effect
• Thermoelectric performance of spin Seebeck effect in Fe3O4/Pt-based thin film heterostructures
• Thermographic measurements of the spin Peltier effect in metal/yttrium-iron-garnet junction systems
• Spin and orbital moments of nanoscale Fe3O4 epitaxial thin film on MgO/GaAs(100)
• Observation of spin Seebeck contribution to the transverse thermopower in Ni-Pt and MnBi-Au bulk nanocomposites
• Enhanced magnon spin transport in NiFe${}_2$O${}_4$ thin films on a lattice-matched substrate
• Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures
• Spin transport in multilayer systems with fully epitaxial NiO thin films
• Spin Seebeck devices using local on-chip heating
• Transition of laser-induced terahertz spin currents from torque- to conduction-electron-mediated transport
• Electrical transport and optical band gap of NiFe${}_{\text{2}}$O${}_{\text{x}}$ thin films
• Thermographic measurements of spin-current-induced temperature modulation in metallic bilayers
• All-oxide spin Seebeck effects
• Sign change in the tunnel magnetoresistance of Fe3O4/MgO/Co-Fe-B magnetic tunnel junctions depending on the annealing temperature and the interface treatment
• Temperature dependence of the Spin Seebeck effect in a mixed valent manganite
• Static Magnetic Proximity Effect in Pt Layers on Sputter-Deposited NiFe2O4 and on Fe of Various Thicknesses Investigated by XRMR
• Spin Seebeck effect and thermal spin galvanic effect in Ni80Fe20/p-Si bilayers
• Role of spin mixing conductance in determining thermal spin pumping near the ferromagnetic phase transition in EuO_{1-x} and La2NiMnO6
• Thermal spin injection and interface insensitivity in permalloy/aluminum metallic non-local spin valves
• Real-time monitoring of the structure of ultra thin Fe${}_3$O${}_4$ films during growth on Nb-doped SrTiO${}_3$(001)
• X-ray magnetic circular dichroism study of epitaxial magnetite ultrathin film on MgO (100)
• Spin Seebeck effect and magnon diffusion length in ${\mathbf{Fe}}_3{\mathbf{O}}_4$
• Spin Seebeck effect in $\epsilon$-Fe${}_2$O${}_3$ thin layer with high coercive field
• Role of magnons and the size effect in heat transport through an insulating ferromagnet/insulator interface
• Tuning the diffusion of magnon in Y3Fe5O12 by light excitation
• Cation- and lattice-site-selective magnetic depth profiles of ultrathin $\mathrm{F}{\mathrm{e}}_3{\mathrm{O}}_4$(001) films
• Microscopic theory of spin Seebeck effect in antiferromagnets
• Measurement of the heat flux normalised spin Seebeck coefficient of thin films as a function of temperature
• Impact of strain and morphology on magnetic properties of Fe${}_3$O${}_4$/NiO bilayers grown on Nb:SrTiO${}_3$(001) and MgO(001)
• Giant enhancement in Rashba spin-Seebeck effect in NiFe/p-Si thin films
• Signature of BKT-like spin transport in a quasi-2D antiferromagnet BaNi${}_2$V${}_2$O${}_8$
• Study on fluctuations of interface-enhanced superconductivity in ultrathin FeSe/SrTiO3 by the Nernst effect