Spin waves cause non-linear friction
Other Condensed Matter
2011-06-27 v2
Abstract
Energy dissipation is studied for a hard magnetic tip that scans a soft magnetic substrate. The dynamics of the atomic moments are simulated by solving the Landau-Lifshitz-Gilbert (LLG) equation numerically. The local energy currents are analysed for the case of a Heisenberg spin chain taken as substrate. This leads to an explanation for the velocity dependence of the friction force: The non-linear contribution for high velocities can be attributed to a spin wave front pushed by the tip along the substrate.
Keywords
Cite
@article{arxiv.1104.0197,
title = {Spin waves cause non-linear friction},
author = {Martin P. Magiera and Lothar Brendel and Dietrich E. Wolf and Ulrich Nowak},
journal= {arXiv preprint arXiv:1104.0197},
year = {2011}
}
Comments
5 pages, 9 figures