Spin Seebeck effect through antiferromagnetic NiO

Abstract

We report temperature-dependent spin-Seebeck measurements on Pt/YIG bilayers and Pt/NiO/YIG trilayers, where YIG (Yttrium iron garnet, Y${}_3$Fe${}_5$O${}_{12}$) is an insulating ferrimagnet and NiO is an antiferromagnet at low temperatures. The thickness of the NiO layer is varied from 0 to 10 nm. In the Pt/YIG bilayers, the temperature gradient applied to the YIG stimulates dynamic spin injection into the Pt, which generates an inverse spin Hall voltage in the Pt. The presence of a NiO layer dampens the spin injection exponentially with a decay length of $2\pm 0.6$ nm at 180 K. The decay length increases with temperature and shows a maximum of $5.5\pm 0.8$ nm at 360 K. The temperature dependence of the amplitude of the spin-Seebeck signal without NiO shows a broad maximum of $6.5\pm 0.5$ $\mu$V/K at 20 K. In the presence of NiO, the maximum shifts sharply to higher temperatures, likely correlated to the increase in decay length. This implies that NiO is most transparent to magnon propagation near the paramagnet-antiferromagnet transition. We do not see the enhancement in spin current driven into Pt reported in other papers when 1-2 nm NiO layers are sandwiched between Pt and YIG.

References in corpus (2)

• Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator
• Spin Seebeck effect in antiferromagnets and compensated ferrimagnets

Cited by in corpus (33)

• Antiferromagnetic spintronics
• Interface-Induced Phenomena in Magnetism
• Negative spin Hall magnetoresistance of Pt on the bulk easy-plane antiferromagnet NiO
• How to manipulate magnetic states of antiferromagnets
• Ultrafast optical excitation of coherent magnons in antiferromagnetic NiO
• Long-distance spin transport in a disordered magnetic insulator
• Longitudinal spin Seebeck coefficient: heat flux vs. temperature difference method
• Ferroic collinear multilayer magnon spin valve
• Spin Superfluidity in Biaxial Antiferromagnetic Insulators
• Evidence for the role of the magnon energy relaxation length in the Spin Seebeck Effect
• Enhanced Spin Conductance of a Thin-Film Insulating Antiferromagnet
• 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
• Anisotropic Magnetoresistance and Nontrivial Spin Hall Magnetoresistance in Pt/$\alpha$-Fe${}_2$O${}_3$ Bilayers
• Observation of spin Seebeck contribution to the transverse thermopower in Ni-Pt and MnBi-Au bulk nanocomposites
• Interfacial Dzyaloshinskii-Moriya Interaction of Antiferromagnetic Materials
• Spin transport across antiferromagnets induced by the spin Seebeck effect
• Spin transport in multilayer systems with fully epitaxial NiO thin films
• Thermally Driven Long Range Magnon Spin Currents in Yttrium Iron Garnet due to Intrinsic Spin Seebeck Effect
• Spin Transport in Thick Insulating Antiferromagnetic Films
• Separation of inverse spin Hall effect and anomalous Nernst effect in ferromagnetic metals
• Role of spin mixing conductance in determining thermal spin pumping near the ferromagnetic phase transition in EuO_{1-x} and La2NiMnO6
• Role of NiO in the nonlocal spin transport through thin NiO films on Y${}_3$Fe${}_5$O${}_{12}$
• Damping enhancement in coherent ferrite/insulating-paramagnet bilayers
• Investigation of anomalous-Hall and spin-Hall effects of antiferromagnetic IrMn sandwiched by Pt and YIG layers
• Spin glass transition in a thin-film NiO/Permalloy bilayer
• Impact of strain and morphology on magnetic properties of Fe${}_3$O${}_4$/NiO bilayers grown on Nb:SrTiO${}_3$(001) and MgO(001)
• Experimental demonstration and analysis of random field effects in ferromagnet/antiferromagnet bilayers
• Magnonic Proximity Effect in Insulating Ferro- and Antiferromagnetic Trilayers
• Spin transfer torques and spin-dependent transport in a metallic F/AF/N tunneling junction
• Topological Aspects of Antiferromagnets
• Intrinsic spin Nernst effect in topological Dirac and magnetic Weyl semimetals
• Interface controlled Berry phase and anisotropic spin-charge conversion in altermagnet-topological insulator bilayers