In this article we report on micromagnetic simulations performed on a permalloy nanostructure in presence of a uniform thermal gradient. Our numerical simulations show that heat flow is an effective mean to compensate the damping, and that the gradients at which spin-wave amplification is observed are experimentally accessible. In particular, we have studied the role of the Gilbert damping parameter on spin-wave amplification.
@article{arxiv.1205.5650,
title = {Spin wave amplification driven by heat flow: the role of damping and exchange interaction},
author = {S. Borlenghi and M. Franchin and H. Fangohr and L. Bergqvist and a. Delin},
journal= {arXiv preprint arXiv:1205.5650},
year = {2012}
}