A5025806035- Magnetic properties of thin films
- Microstructure and mechanical properties
- Advanced Condensed Matter Physics
- Solidification and crystal growth phenomena
- Quantum and electron transport phenomena
- Magnetic and transport properties of perovskites and related materials
- Terahertz technology and applications
- Copper Interconnects and Reliability
Université de Strasbourg
2025
Institut de Physique et Chimie des Matériaux de Strasbourg
2024-2025
Helmholtz-Zentrum Berlin für Materialien und Energie
2025
Centre National de la Recherche Scientifique
2025
Femtosecond laser pulses can be used to induce ultrafast changes of the magnetization in magnetic materials. Several microscopic mechanisms have been proposed explain these observations, including transport ultrashort spin-polarized hot-electrons (SPHE). However, currently such spin currents are only poorly characterized due measurement requirements for element and time resolution. Here, using time- element-resolved X-ray circular dichroism alongside atomistic spin-dynamics simulations, we...
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 electron spin systems through transient absorption spectroscopy magnetic circular dichroism, 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 from...
Time-resolved absorption spectroscopy and magnetic circular dichroism with circularly polarized soft x-rays (XAS XMCD) are powerful tools to probe electronic dynamics in materials element- site-selectively. By 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,...
The controlled manipulation of spins on ultrashort timescales is among the most promising solutions for novel high-speed and low-power-consumption spintronic magnetic recording applications. To do so, terahertz (THz) light pulses can be used to drive coherent magnetization dynamics in ferromagnetic thin films. We were able resolve these nanoscale employing THz-pump x-ray resonant scattering from labyrinth-type domain network a Co/Pt multilayer with perpendicular anisotropy. Our results...