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

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.

References in corpus (2)

• Connecting the timescales in picosecond remagnetization experiments
• Large angle magnetization dynamics measured by time-resolved ferromagnetic resonance

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