Quasilinear spin voltage profiles in spin thermoelectrics

Abstract

Recent experiments show that spin thermoelectrics is a promising approach to generate spin voltages. While spin chemical potentials are often limited to a surface layer of the order of the spin diffusion length, we show that thermoelectrically induced spin chemical potentials can extend much further in itinerant ferromagnets with paramagnetic impurities. In some cases, conservation laws, e.g., for a combination of spin and heat currents, give rise to a linear spin voltage profile. More generally, we find quasilinear profiles involving a spin thermoelectric length scale which far exceeds the spin diffusion length.

4+ pages

References in corpus (5)

• Spin Seebeck insulator
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Theory of magnon-driven spin Seebeck effect
• Linear-response theory of spin Seebeck effect in ferromagnetic insulators
• Gigantic enhancement of spin Seebeck effect by phonon drag

Cited by in corpus (6)

• Spin Caloritronics
• Theory of the Spin Seebeck Effect
• Thermally-induced spin polarization of a two dimensional electron gas
• Spin thermoelectrics in a disordered Fermi gas
• Spin Caloritronics in Noncondensed Bose Gases
• Spin-heat relaxation and thermo-spin diffusion in atomic Bose and Fermi gases