Spin Seebeck effect in two-sublattice ferrimagnets in the vicinity of $T_{\mathrm{C}}$

Abstract

Spin Seebeck effect refers to the magnonic thermal spin injection from a magnet into the adjacent heavy metal. A ferrimagnetic insulator yttrium iron garnet (YIG) is the material most studied for the spin Seebeck effect. Here, to account for a convex downward temperature dependence of the spin Seebeck effect observed in YIG/Pt system near the Curie temperature $T_{\mathrm{C}}$, we develop Ginzburg-Landau theory of the spin Seebeck effect in two-sublattice ferrimagnets. We find that only when we take into account the "Néel coupling", i.e., interfacial exchange coupling between the Néel order parameter of YIG and spin accumulation of Pt, the convex downward temperature dependence is explained. The present result sheds light on the importance of the Néel coupling in ferrimagnetic spintronics.

arXiv commentSelected as a PRB Editors' Suggestion

References in corpus (30)

• Spin Caloritronics
• Spin Seebeck insulator
• Long distance transport of magnon spin information in a magnetic insulator at room temperature
• Theory of magnon-driven spin Seebeck effect
• Theory of the Spin Seebeck Effect
• Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator
• Acoustic spin pumping as the origin of the long-range spin Seebeck effect
• Linear-response theory of spin Seebeck effect in ferromagnetic insulators
• Magnon Polarons in the Spin Seebeck Effect
• Determination of the origin of the spin Seebeck effect - bulk vs. interface effects
• Thermal spin dynamics of yttrium iron garnet
• Observation of spin current in quantum spin liquid
• Gigantic enhancement of spin Seebeck effect by phonon drag
• Spin colossal magnetoresistance in an antiferromagnetic insulator
• The Final Chapter In The Saga Of YIG
• Magnetization noise in magnetoelectronic nanostructures
• Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures
• Picosecond spin Seebeck effect
• Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
• Spin Seebeck effect at microwave frequencies
• Neutron-scattering study of yttrium iron garnet
• Magnon Pairs and Spin-Nematic Correlation in the Spin-Seebeck Effect
• Triplon current generation in solids
• Antiferromagnetic spin Seebeck effect across the spin-flop transition: A stochastic Ginzburg-Landau simulation
• Spin Seebeck effect in paramagnets and antiferromagnets at elevated temperatures
• Spin Seebeck effect in a simple ferromagnet near Tc: A Ginzburg-Landau approach
• Microscopic theory of spin Seebeck effect in antiferromagnets
• Spin Seebeck Effect as a Probe for Majorana Fermions in Kitaev Spin Liquids
• Spin caloritronics as a probe of nonunitary superconductors
• Signature of BKT-like spin transport in a quasi-2D antiferromagnet BaNi${}_2$V${}_2$O${}_8$

Cited by in corpus (1)

• Ginzburg-Landau theory of spin pumping through an antiferromagnetic layer near the Néel temperature