Seminar - Time resolved electron spectroscopy approach to describe fast magnetization dynamics

Fausto Sirotti (Ecole Polytechnique, France)  

Date: 21. 11. 2018 at 14:00 

Place: FME BUT, A2/201  

Ultrafast manipulation and control of materials magnetization have attracted an intensive activity for decades.  Several approaches were proposed to study magnetization dynamics, from magnetic field pulses to spin polarized currents, but the several open questions remains in describing the sub-picosecond regime of magnetization dynamics.  I will present results (mainly obtained using synchrotron radiation sources) to highlight the importance of electron spectroscopy in describing the electron dynamics and how electronic structure can bring important information for the understanding of the magnetization and demagnetization processes.

• F. Pressacco et al. "Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission" Structural Dynamics., 5(3): art.n° 034501. (2018).
• N. Bergeard et al.  “Correlation between structure, electronic properties, and magnetism in CoxGd1−x thin amorphous films" Physical Review B., 96(6): art.n° 064418. (2017).
• M. Izquierdo et al. "Protected surface state in stepped Fe (0 18 1)" Scientific Reports., 7: art. n° 6609. (2017).
• R. Costantini et al. "Time resolved resonant photoemission study of energy level alignment at donor/acceptor interfaces" Chemical Physics Letters., 683: 135-139. (2017).
• M.G. Silly et al. "Pump−probe experiments at the TEMPO beamline using the low-α operation mode of Synchrotron SOLEIL" Journal of Synchrotron Radiation., 24(4): 886-897. (2017).
• F. Pressacco et al.  "Stable room-temperature ferromagnetic phase at the FeRh(100) surface" Scientific Reports., 6: art.n° 22383. (2016). 
• F. Sirotti et al. "Multiphoton k-resolved photoemission from gold surface states with 800-nm femtosecond laser pulses" Physical Review B., 90(3): art.n° 035401. (2014).