In this work,we report on modeling results obtained with our recently developed simulation tool enabling nanoscopic description of electronic processes in X-ray irradiated ferromagnetic materials.With this tool,we hav...In this work,we report on modeling 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 toward quantitative control and manipulation of X-ray induced magnetic processes on femtosecond timescales.展开更多
基金V.T.,A.L.,S.M.,B.Z.acknowledge the funding received from the Collaboration Grant of the European XFEL and the Institute of Nuclear Physics,Polish Academy of SciencesK.J.K.thanks the Polish National Agency for Academic Exchange for funding in the frame of the Bekker programme(PPN/BEK/2020/1/00184)+1 种基金K.J.K.acknowledges also the CFEL-DESY Theory group for the hospitality during his six-month research stay in Hamburg in 2019–2020 financed by the National Science Centre(Poland)under the program SONATINA 1 no.2017/24/C/ST3/00276L.M.and A.P.-K.acknowledge funding by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)-SFB-925-project 170620586.
文摘In this work,we report on modeling 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 toward quantitative control and manipulation of X-ray induced magnetic processes on femtosecond timescales.
