Longitudinal spin Seebeck coefficient: heat flux vs. temperature difference method

Abstract

The determination of the longitudinal spin Seebeck effect (LSSE) coefficient is currently plagued by a large uncertainty due to the poor reproducibility of the experimental conditions used in its measurement. In this work we present a detailed analysis of two different methods used for the determination of the LSSE coefficient. We have performed LSSE experiments in different laboratories, by using different setups and employing both the temperature difference method and the heat flux method. We found that the lack of reproducibility can be mainly attributed to the thermal contact resistance between the sample and the thermal baths which generate the temperature gradient. Due to the variation of the thermal resistance, we found that the scaling of the LSSE voltage to the heat flux through the sample rather than to the temperature difference across the sample greatly reduces the uncertainty. The characteristics of a single YIG/Pt LSSE device obtained with two different setups was $(1.143\pm 0.007)\cdot 10^{-7}$ Vm/W and $(1.101\pm 0.015)\cdot 10^{-7}$ Vm/W with the heat flux method and $(2.313\pm 0.017)\cdot 10^{-7}$ V/K and $(4.956\pm 0.005)\cdot 10^{-7}$ V/K with the temperature difference method. This shows that systematic errors can be considerably reduced with the heat flux method.

arXiv commentPDFLaTeX, 10 pages, 6 figures

References in corpus (22)

• Spin Caloritronics
• Theory of magnon-driven spin Seebeck effect
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Thermoelectric generation based on spin Seebeck effects
• Local charge and spin currents in magnetothermal landscapes
• Determination of the origin of the spin Seebeck effect - bulk vs. interface effects
• Gigantic enhancement of spin Seebeck effect by phonon drag
• Transverse spin Seebeck vs. Anomalous and Planar Nernst Effects in Permalloy Thin Films
• Spin Seebeck effect in antiferromagnets and compensated ferrimagnets
• Thermally driven spin and charge currents in thin NiFe2O4/Pt films
• Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO
• Current heating induced spin Seebeck effect
• Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures
• Simultaneous detection of the spin-Hall magnetoresistance and the spin-Seebeck effect in Platinum and Tantalum on Yttrium Iron Garnet
• Spin Seebeck effect through antiferromagnetic NiO
• Influence of heat flow directions on Nernst effects in Py/Pt bilayers
• Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers
• Non-equilibrium thermodynamics of the spin Seebeck and spin Peltier effects
• Spin Seebeck devices using local on-chip heating
• Quantitative separation of the anisotropic magnetothermopower and planar Nernst effect by the rotation of an in-plane thermal gradient
• Dependence of transverse magneto-thermoelectric effects on inhomogeneous magnetic fields
• Thermal conductance of thin film YIG determined using Bayesian statistics

Cited by in corpus (27)

• Evidence for the role of the magnon energy relaxation length in the Spin Seebeck Effect
• Spin and spin current -- From fundamentals to recent progress
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers
• Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures
• Room temperature and low-field resonant enhancement of spin Seebeck effect in partially compensated magnets
• Spincaloritronic measurements: a round robin comparison of the longitudinal spin Seebeck effect
• 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
• Spin Seebeck effect and thermal spin galvanic effect in Ni80Fe20/p-Si bilayers
• Enhancement in Thermally Generated Spin Voltage at Pd/NiFe${}_2$O${}_4$ Interfaces by the Growth on Lattice-Matched Substrates
• Role of spin mixing conductance in determining thermal spin pumping near the ferromagnetic phase transition in EuO_{1-x} and La2NiMnO6
• Spin Seebeck effect and magnon diffusion length in ${\mathbf{Fe}}_3{\mathbf{O}}_4$
• Spin Seebeck effect in Y-type hexagonal ferrite thin films
• Spin Seebeck effect in $\epsilon$-Fe${}_2$O${}_3$ thin layer with high coercive field
• Thermal effects in spintronic materials and devices: an experimentalist's guide
• Free-Layer-Thickness-dependence of the Spin Galvanic Effect with Spin Rotation Symmetry
• Measurement of the heat flux normalised spin Seebeck coefficient of thin films as a function of temperature
• Thermal spin current generation in the multifunctional ferrimagnet Ga${}_{0.6}$Fe${}_{1.4}$O${}_3$
• Broadband Optical Detection using the Spin Seebeck Effect
• Anomalous Nernst effect in ferromagnetic Mn${}_5$Ge${}_3$C${}_x$ thin films on insulating sapphire
• Giant enhancement in Rashba spin-Seebeck effect in NiFe/p-Si thin films
• Low-temperature nanoscale heat transport in a gadolinium iron garnet heterostructure probed by ultrafast x-ray diffraction
• Signature of BKT-like spin transport in a quasi-2D antiferromagnet BaNi${}_2$V${}_2$O${}_8$
• Bias current dependence of superconducting transition temperature in superconducting spin valve nanowires
• Electrical Seebeck-Contrast Observation of Magnon Hall Effect in Topological Ferromagnet Lu${}_2$V${}_2$O${}_7$/Heavy Metal Heterostructures