Magnetic dynamics driven by the spin-current generated via spin-Seebeck effect

TL;DR

This paper investigates how spin-currents generated by the spin-Seebeck effect influence magnetic nanostructures, revealing spin-current scattering causes torque, precession, displacement, and symmetry breaking in voltage response.

Contribution

It introduces a detailed analysis of spin-current scattering effects on magnetic nanostructures driven by thermal gradients, highlighting new mechanisms of magnetic dynamics.

Findings

Spin-current scattering induces torque and precession.

Displacement of the nanostructure due to spin-current effects.

Breaking of polarity-reversal symmetry in inverse spin Hall voltage.

Abstract

We consider the spin-current driven dynamics of a magnetic nanostructure in a conductive magnetic wire under a heat gradient in an open circuit, spin Seebeck effect geometry. It is shown that the spin-current scattering results in a spin-current torque acting on the nanostructure and leading to precession and displacement. The scattering leads also to a redistribution of the spin electrochemical potential along the wire resulting in a break of the polarity-reversal symmetry of the inverse spin Hall effect voltage with respect to the heat gradient inversion.