Fig. 2
From: Ultrafast optical manipulation of magnetic order in ferromagnetic materials
a Schematic of the laser-excited superdiffusive processes. b Lifetimes and c velocities of electrons in Ni. d Calculated demagnetization of Ni, in comparison with X-ray magnetic circular dichroism data. e Schematic illustration of Terahertz emission after the laser excitation. The electrical current jc is generated by the inverse spin Hall effect from the spin current js. f Terahertz emission by laser pumping Fe/Ru and Fe/Au thin films. The signal inverts when the magnetization inverts (dark to light curves). g Schematic of the pump-probe approach. h Odd and even part of the time-dependent SHG signal. Figure a and d are reproduced with permission from ref. [50]. Copyright (2010) American Physical Society. Figure b and c are reproduced with permission from ref. [51]. Copyright (2012) American Physical Society. Figure e and f are reproduced with permission from ref. [53]. Copyright (2013) Springer Nature. Figure g and h are reproduced with permission from ref. [58]. Copyright (2017) American Physical Society