Spin excitations in a monolayer scanned by a magnetic tip

Magiera, Martin P.; Brendel, Lothar; Wolf, Dietrich E.; Nowak, Ulrich

Spin excitations in a monolayer scanned by a magnetic tip

Files

magieraspin.pdf(473.75 KB)

Date

2009

Authors

Magiera, Martin P.

Brendel, Lothar

Wolf, Dietrich E.

Nowak, Ulrich

Publication type

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.

Subject (DDC)

530 Physics

Cite This

ISO 690

MAGIERA, 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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Bibliography of Konstanz

Yes