Simulating x-ray diffraction of laser driven atomic diffusion

Atomic diffusion in multi-metallic systems plays a very important role in the growth and development of novel metallic alloys and magnetic materials. Therefore, understanding the atomic scale dynamics that drive this diffusion is of fundamental importance. An x-ray diffraction simulation for the diffusion process in a metallic multi-layered system under picosecond laser excitation is presented. A simple one-dimensional atomic diffusion model was numerically simulated to describe the time-dependent concentration profile. X-ray diffraction patterns from the simulated concentration profiles patterns were then directly compared to experimental data, to reconstruct the concentration profile of laser driven diffusion.