Heisenberg vs. Stoner: Probing the Microscopic Picture of Ultrafast Demagnetization using High Harmonics

Abstract

We uncover the multiple mechanisms underlying laser-driven demagnetization in cobalt using a tabletop high harmonic source. Ultrafast magnon excitation, as well as a transient reduction of the exchange splitting, are both important on femtosecond timescales.

Keywords

• Heisenberg
• Stoner
• Probing
• Microscopic
• Picture
• Ultrafast
• Demagnetization
• using
• High
• Harmonics