Ultrafast demagnetization at high temperatures
arXiv:1802.05375 · doi:10.1088/1361-648X/aab9f1
Abstract
Time-resolved pump-probe measurements were made at variable heat accumulation in Co/Pd superlattices. Heat accumulation increases the baseline temperature and decreases the equilibrium magnetization. Transient ultrafast demagnetization first develops with higher fluence in parallel with strong equilibrium thermal spin fluctuations. The ultrafast demagnetization is then gradually removed as the equilibrium temperature approaches the Curie temperature. The transient magnetization time-dependence is fit well with the spin-flip scattering model.
arXiv comment6 pages, 5 figures
References in corpus (9)
- Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
- Fokker-Planck and Landau-Lifshitz-Bloch Equations for Classical Ferromagnets
- Tunable Magnonic Frequency and Damping in [Co/Pd]8 Multilayers with Variable Co Layer Thickness
- Speed limit of FePt spin dynamics on femtosecond timescales
- The Landau-Lifshitz-Bloch equation for ferrimagnetic materials
- Multiscale modeling of ultrafast element-specific magnetization dynamics of ferromagnetic alloys
- Quantum Landau-Lifshitz-Bloch equation and its comparison with the classical case
- Heat accumulation and all-optical switching by domain wall motion in Co/Pd superlattices
- Heat diffusion in magnetic superlattices on glass substrates