Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers

Abstract

We identify and investigate thermal spin transport phenomena in sputter-deposited Pt/NiFe${}_2$O${}_{\text{4-x}}$ ($4\ge x\ge 0$) bilayers. We separate the voltage generated by the spin Seebeck effect from the anomalous Nernst effect contributions and even disentangle the intrinsic anomalous Nernst effect (ANE) in the ferromagnet (FM) from the ANE produced by the Pt that is spin polarized due to its proximity to the FM. Further, we probe the dependence of these effects on the electrical conductivity and the band gap energy of the FM film varying from nearly insulating NiFe${}_2$O${}_4$ to metallic Ni${}_{33}$Fe${}_{67}$. A proximity-induced ANE could only be identified in the metallic Pt/Ni${}_{33}$Fe${}_{67}$ bilayer in contrast to Pt/NiFe${}_2$O${}_{\mathrm{x}}$ ($x>0$) samples. This is verified by the investigation of static magnetic proximity effects via x-ray resonant magnetic reflectivity.

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Cited by in corpus (19)

• Longitudinal spin Seebeck coefficient: heat flux vs. temperature difference method
• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures
• Enhanced magnon spin transport in NiFe${}_2$O${}_4$ thin films on a lattice-matched substrate
• 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
• Fabrication of yttrium-iron-garnet/Pt multilayers for the longitudinal spin Seebeck effect
• Temperature dependence of the Spin Seebeck effect in a mixed valent manganite
• Anomalous Nernst effect on the nanometer scale: Exploring three-dimensional temperature gradients in magnetic tunnel junctions
• 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
• Vectorial observation of the spin Seebeck effect in epitaxial NiFe${}_2$O${}_4$ thin films with various magnetic anisotropy contributions
• Spin Seebeck effect and magnon diffusion length in ${\mathbf{Fe}}_3{\mathbf{O}}_4$
• Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ and inverted Y${}_3$Fe${}_5$O${}_{12}$/Pt bilayers
• Advanced data analysis procedure for hard x-ray resonant magnetic reflectivity discussed for Pt thin film samples of various complexity
• Thermal effects in spintronic materials and devices: an experimentalist's guide
• Quantitative comparison of the magnetic proximity effect in Pt detected by XRMR and XMCD
• Magnetism and nonlinear charge transport in NiFe2O4/γ-Al2O3/SrTiO3 heterostructure: Toward Spintronic Applications