Thermally excited spin waves in a nano-structure: thermal gradient vs. constant temperature
Mesoscale and Nanoscale Physics
2013-03-13 v1
Abstract
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.
Cite
@article{arxiv.1303.2895,
title = {Thermally excited spin waves in a nano-structure: thermal gradient vs. constant temperature},
author = {Simone Borlenghi and Matteo Franchin and Hans Fangohr and Lars Bergqvist and Anna Delin},
journal= {arXiv preprint arXiv:1303.2895},
year = {2013}
}