Using light to drive phase transitions in quantum materials is an emerging tool for inducing material properties “on demand” [1]. However, while we have many methods to measure the average change in material properties on the femtosecond timescale, observing the spatial dynamics of the phase transition with femtosecond time resolution has remained challenging.
In this work, I will...
Magnetic domains are fingerprints of the complex interactions within magnetic materials. In addition to a local magnetic order, these emergent textures exhibit lateral periodicities on the nanoscale with a specific orientation and distribution. Statically, the relevant magnetic interactions can be tailored by growing heterostructures of magnetic nanolayers and by applying external stimuli such...
The properties and functionalities of solids, molecules and hybrid compounds used in modern technology is dictated by the interplay between the electronic, lattice and spin degrees of freedoms. Pump-probe techniques are ideal to selectively investigate their time evolution and disentangle complex processes. Their extension to the Extreme Ultraviolet and X-ray regime allows element specificity...
Magnetic diffraction using x-ray detected ferromagnetic resonance (DFMR) offers a powerful and novel technique for performing time-resolved measurements on individual spin textures [1,2]. DFMR combines FMR and circular dichroism in REXS as pump and probe, respectively. This allows us to study the element-, layer-, and mode-selective magnetisation dynamics by stroboscopic probing, utilizing the...
Spin waves are the fundamental excitations in magnetic systems. At low densities, they behave as independent quasiparticles that can mediate solid-state interactions such as superconducting pairing or can be used to transport information in technology. At sufficiently high densities, spin waves can condense into solitons that derive their stability from nonlinear spin precession....
Ultrafast manipulation of magnetic order has challenged our understanding of the fundamental and dynamic properties of magnetic materials. Until now, single-shot magnetic switching has been limited to ferrimagnetic alloys, multilayers, and engineered ferromagnetic heterostructures [1-2]. In ferromagnetic (FM)/antiferromagnetic (AFM) bilayers, the exchange bias field (He) arises from...
