Authors Referees APS Members |
January 2008, to be published in Physical Review B1
Activation of additional energy dissipation processes in the magnetization
dynamics of epitaxial chromium dioxide films
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 sharply. This behavior might stem from spin-wave instabilities. © 2008 The American Physical Society.
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