2017/01/31 by Emmanuelle Jal, Victor López-Flores, Víctor López‐Flores +10 · 1 citation
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #Advanced Electron Microscopy Techniques and Applications #Condensed matter physics #Demagnetizing field #Femtosecond #Laser #Magnetic Properties and Applications #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Materials science #Optics #Physics #Picosecond #Ultrashort pulse #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.95.184422
published as Phys. Rev. B 95, 184422 (2017)
openalex publication_date 2017/05/18 · arxiv created 2017/12/07 · arxiv updated 2017/12/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Despite two decades of intense research, the origin of ultrafast demagnetization remains disputed. Here, the authors employ resonant magnetic x-ray reflectivity to follow simultaneously magnetization and structural dynamics at the BESSY femtoslicing source. They find that significant changes in nonmagnetic x-ray reflectivity accompany the subpicosecond demagnetization, which can be modeled as a variation of film thickness. Their simulations further show that the higher photon flux and energy resolution provided by x-ray free electron lasers will yield decisive data to differentiate between different mechanisms proposed to govern ultrafast demagnetization dynamics.