1303.2895 (Simone Borlenghi et al.)

Thermally excited spin waves in a nano-structure: thermal gradient vs.
constant temperature    [PDF]

Simone Borlenghi, Matteo Franchin, Hans Fangohr, Lars Bergqvist, Anna Delin

Using micromagnetic simulations, we have investigated spin dynamics in a nanostructure in the presence of thermal fluctuations. In particular, we have studied the effects of a uniform temperature and of a uniform thermal gradient. In both cases, the stochastic field leads to an increase of the precession angle of the magnetization, and to a mild decreas of the linewidth of the resonance peaks. Our results indicate that the Gilbert damping parameter plays the role of control parameter for the amplification of spin waves.

View original: http://arxiv.org/abs/1303.2895