Energy and magnetisation transport in non-equilibrium macrospin systems
Statistical Mechanics
2015-03-03 v1
Abstract
We investigate numerically the magnetisation dynamics of an array of nano-disks interacting through the magneto-dipolar coupling. In the presence of a temperature gradient, the chain reaches a non-equilibrium steady state where energy and magnetisation currents propagate. This effect can be described as the flow of energy and particle currents in an off-equilibrium discrete nonlinear Schr\"odinger (DNLS) equation. This model makes transparent the transport properties of the system and allows for a precise definition of temperature and chemical potential for a precessing spin. The present study proposes a novel setup for the spin-Seebeck effect, and shows that its qualitative features can be captured by a general oscillator-chain model
Cite
@article{arxiv.1503.00461,
title = {Energy and magnetisation transport in non-equilibrium macrospin systems},
author = {Simone Borlenghi and Stefano Iubini and Stefano Lepri and Jonathan Chico and Lars Bergqvist and Anna Delin and Jonas Fransson},
journal= {arXiv preprint arXiv:1503.00461},
year = {2015}
}