A5078079284- Advanced X-ray Imaging Techniques
- Magnetic properties of thin films
- Computational Physics and Python Applications
- Advanced Electron Microscopy Techniques and Applications
- Functional Brain Connectivity Studies
- Characterization and Applications of Magnetic Nanoparticles
- Theoretical and Computational Physics
- Neural Networks and Reservoir Computing
- Diamond and Carbon-based Materials Research
- Atomic and Subatomic Physics Research
- Advanced X-ray and CT Imaging
- Physics of Superconductivity and Magnetism
- Advancements in Photolithography Techniques
- Metamaterials and Metasurfaces Applications
- Geomagnetism and Paleomagnetism Studies
Laboratoire Albert Fert
2023
Université Paris-Saclay
2023
Centre National de la Recherche Scientifique
2023
Helmholtz-Zentrum Berlin für Materialien und Energie
2021-2023
Magnetic skyrmions are quasiparticles with nontrivial topology, envisioned to play a key role in next-generation data technology while simultaneously attracting fundamental research interest due their emerging topological charge. In chiral magnetic multilayers, current-generated spin-orbit torques or ultrafast laser excitation can be used nucleate isolated on picosecond time scale. Both methods, however, produce randomly arranged skyrmions, which inherently limits the precision location at...
Magnetic skyrmions can be created and annihilated in ferromagnetic multilayers using single femtosecond infrared laser pulses above a material-dependent fluence threshold. From the perspective of applications, optical control offers route to faster and, potentially, more energy-efficient new class information-technology devices. Here, we investigate laser-induced skyrmion generation two different materials, mapping out dependence process on applied field fluence. We observe that sample...
Fluctuations and stochastic transitions are ubiquitous in nanometre-scale systems, especially the presence of disorder. However, their direct observation has so far been impeded by a seemingly fundamental, signal-limited compromise between spatial temporal resolution. Here we develop coherent correlation imaging (CCI) to overcome this dilemma. Our method begins classifying recorded camera frames Fourier space. Contrast resolution emerge averaging selectively over same-state frames. Temporal...
The development and characterization of three-dimensional topological magnetic textures has become an important topic in modern magnetism from both fundamental technological perspectives. Here, the authors stabilize skyrmionic cocoons by engineering properties Pt/Co/Al based multilayers with variable Co thickness. These new can be observed transmission x-ray holography. Their coexistence skyrmion tubes is particularly interesting as they open paths for spintronics.
Soft x-ray microscopy plays an important role in modern spintronics. However, the achievable resolution of most magnetic imaging experiments limits access to fundamental and technologically relevant length scales sub-10 nm regime. Here, we demonstrate with 5 by combining holography-assisted coherent diffractive heterodyne amplification weak signal. The gain contrast makes pinning sites visible allows measure local width domain walls. ability detect map such properties photons opens new...
The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen first user experiments: ptychography free-electron laser, holographic imaging storage ring and preliminary tests on correlation spectroscopy. performed remarkably well terms of spatial resolution achievable sample plane, owing to small pixel size, large active area very dynamic range; but also frame rate, which significantly faster...
Spin-orbit torques (SOTs) act as efficient drivers for nanoscale magnetic systems, such in tunnel junctions, nano-oscillators and racetrack geometries. In particular, combination with materials exhibiting high Dzyaloshinskii--Moriya interaction, SOTs are considered to result well-controlled deterministic magnetisation dynamics are, therefore, used robust drives move create skyrmions. contrast these expectations, we here find unpredictable, transiently chaotic induced by SOT at an artificial...
Soft x-ray microscopy plays an important role in modern spintronics. However, the achievable resolution of most magnetic imaging experiments is above 10 nm, limiting access to fundamental and technologically relevant length scales. Here, we demonstrate with 5 nm by combining holography-assisted coherent diffractive heterodyne amplification weak signal. The gain contrast allows direct key properties, including domain wall profiles position pinning sites. ability detect map such properties...