A5025070240- Magnetic properties of thin films
- Rare-earth and actinide compounds
- Crystal Structures and Properties
- Particle Accelerators and Free-Electron Lasers
- Advanced Chemical Physics Studies
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- High-pressure geophysics and materials
Freie Universität Berlin
2024
The use of advanced X-ray sources plays a key role in the study dynamic processes magnetically ordered materials. progress free electron lasers enables direct and simultaneous observation femtosecond evolution spin systems through transient absorption spectroscopy (XAS) magnetic circular dichroism (XMCD), respectively. Such experiments allow us to resolve response seen population spin-split valence states upon optical excitation. Here, we utilize circularly polarized ultrashort soft pulses...
Time-resolved absorption spectroscopy as well magnetic circular dichroism with circularly polarized soft X-rays (XAS and XMCD) are powerful tools to probe electronic dynamics in materials element- site-selectively. Employing these methods, groundbreaking results have been obtained for instance alloys, which helped fundamentally advance the field of ultrafast magnetization dynamics. At free electron laser facility FLASH key capabilities XAS XMCD experiments recently improved: In an upgrade,...
A change of orbital state alters the coupling between ions and their surroundings drastically. Orbital excitations are hence key to understand control interaction ions. Rare-earth elements with strong magneto-crystalline anisotropy (MCA) important ingredients for magnetic devices. Thus, localized 4
A change of orbital state alters the coupling between ions and their surroundings drastically. Orbital excitations are hence key to understand control interaction ions. Rare-earth (RE) elements with strong magneto-crystalline anisotropy (MCA) important ingredients for magnetic devices. Thus, localized 4f moments is one major challenge in ultrafast spin physics. With time-resolved X-ray absorption resonant inelastic scattering experiments, we show Tb metal that 4f-electronic out ground...