Spin excitations in a monolayer scanned by a magnetic tip

2009
Authors
Magiera, Martin P.
Brendel, Lothar
Wolf, Dietrich E.
Journal article
Published in
epl ; 87 (2009). - 26002
Abstract
Energy dissipation via spin excitations is investigated for a hard ferromagnetic tip scanning a soft magnetic monolayer. We use the classical Heisenberg model with Landau-Lifshitz-Gilbert (LLG) dynamics including a stochastic field representing finite temperatures. The friction force depends linearly on the velocity (provided it is small enough) for all temperatures. For low temperatures, the corresponding friction coefficient is proportional to the phenomenological damping constant of the LLG equation. This dependence is lost at high temperatures, where the friction coefficient decreases exponentially. These findings can be explained by properties of the spin polarisation cloud dragged along with the tip.
530 Physics
Cite This
ISO 690MAGIERA, Martin P., Lothar BRENDEL, Dietrich E. WOLF, Ulrich NOWAK, 2009. Spin excitations in a monolayer scanned by a magnetic tip. In: epl. 87, 26002. Available under: doi: 10.1209/0295-5075/87/26002
BibTex
@article{Magiera2009excit-5071,
year={2009},
doi={10.1209/0295-5075/87/26002},
title={Spin excitations in a monolayer scanned by a magnetic tip},
volume={87},
journal={epl},
author={Magiera, Martin P. and Brendel, Lothar and Wolf, Dietrich E. and Nowak, Ulrich},
note={Article Number: 26002}
}

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Yes