Speaker
E. Jal
(LCPMR, Sorbonne Université, France)
Description
Even after two decades of studies and debates, the mechanisms of ultrafast demagnetization remain disputed. To bring new experimental information into this field, and with the advent of femtosecond X-rays sources, I will present the results of our recent time-resolved soft X-ray resonant Magnetic Reflectivity experiment on an Fe thin film. First I will show how this technique allows probing simultaneously structural and magnetism dynamics, and how to perform it at FLASH. Second I will present our results and unravel the dynamics of the transient inhomogeneous depth magnetic profile of the Fe layer.
