Spin wave amplification driven by heat flow: the role of damping and   exchange interaction
  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. 
S. Borlenghi, M. Franchin, H. Fangohr, L. Bergqvist and a. Delin
cond-mat.mes-hall