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arXiv · 0710.0986

Activation of additional energy dissipation processes in the magnetization dynamics of epitaxial chromium dioxide films

G. M. Müller·M. Münzenberg·G. -X. Miao·A. Gupta
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Abstract

The precessional magnetization dynamics of a chromium dioxide$(100)$ film is examined in an all-optical pump-probe setup. The frequency dependence on the external field is used to extract the uniaxial in-plane anisotropy constant. The damping shows a strong dependence on the frequency, but also on the laser pump fluency, which is revealed as an important experiment parameter in this work: above a certain threshold further channels of energy dissipation open and the damping increases discontinuously. This behavior might stem from spin-wave instabilities.

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G. M. Müller, M. Münzenberg, G. -X. Miao, A. Gupta. 2007-10-08. Activation of additional energy dissipation processes in the magnetization dynamics of epitaxial chromium dioxide films. https://doi.org/10.1103/physrevb.77.020412

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