In this work, we report on modelling results obtained with our recently developed simulation tool enabling nanoscopic description of electronic processes in X-ray irradiated ferromagnetic materials. With this tool, we have studied the response of Co/Pt multilayer system irradiated by an ultrafast extreme ultraviolet pulse at the M-edge of Co (photon energy ∼ 60 eV). It was previously investigated experimentally at the FERMI free-electron-laser facility, using the magnetic small-angle X-ray scattering technique. Our simulations show that the magnetic scattering signal from cobalt decreases on femtosecond timescales due to electronic excitation, relaxation and transport processes both in the cobalt and in the platinum layers, following the trend observed in the experimental data. The confirmation of the predominant role of electronic processes for X-ray induced demagnetization in the regime below the structural damage threshold is a step towards quantitative control and manipulation of X-ray induced magnetic processes on femtosecond timescales.
@article{arxiv.2202.13845,
title = {Modeling of ultrafast X-ray induced magnetization dynamics in magnetic multilayer systems},
author = {K. J. Kapcia and V. Tkachenko and F. Capotondi and A. Lichtenstein and S. Molodtsov and L. Mueller and A. Philippi-Kobs and P. Piekarz and B. Ziaja},
journal= {arXiv preprint arXiv:2202.13845},
year = {2022}
}
Comments
18 pages, 7 figures; minor changes. This is the author created version of an article accepted for publication in npj Computational Materials journal. The article has been published on a gold open access basis under a CC BY 4.0 licence