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arXiv · 1303.2895

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

Simone Borlenghi·Matteo Franchin·Hans Fangohr·Lars Bergqvist·Anna Delin
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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.

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Simone Borlenghi, Matteo Franchin, Hans Fangohr, Lars Bergqvist, Anna Delin. 2013-03-12. Thermally excited spin waves in a nano-structure: thermal gradient vs. constant temperature. https://arxiv.org/abs/1303.2895

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