Valentin Chardonnet
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View article: Electron population dynamics in resonant non-linear x-ray absorption in nickel at a free-electron laser
Electron population dynamics in resonant non-linear x-ray absorption in nickel at a free-electron laser Open
Free-electron lasers provide bright, ultrashort, and monochromatic x-ray pulses, enabling novel spectroscopic measurements not only with femtosecond temporal resolution: The high fluence of their x-ray pulses can also easily enter the regi…
View article: Ultrafast Opto-magnetic Effects in the Extreme Ultraviolet Spectral Range
Ultrafast Opto-magnetic Effects in the Extreme Ultraviolet Spectral Range Open
Coherent light-matter interactions mediated by opto-magnetic phenomena like the inverse Faraday effect (IFE) are expected to provide a non-thermal pathway for ultrafast manipulation of magnetism on timescales as short as the excitation pul…
View article: Electron Population Dynamics in Resonant Non-Linear X-ray Absorption in Nickel at a Free-Electron Laser
Electron Population Dynamics in Resonant Non-Linear X-ray Absorption in Nickel at a Free-Electron Laser Open
Free-electron lasers provide bright, ultrashort, and monochromatic X-ray pulses, enabling novel spectroscopic mea-surements not only with femtosecond temporal resolution: The high fluence of their X-ray pulses can also easily enterthe regi…
View article: Analytic description and optimization of magneto-optical Kerr setups with photoelastic modulation
Analytic description and optimization of magneto-optical Kerr setups with photoelastic modulation Open
Instruments based on the magneto-optical Kerr effect are routinely used to probe surface magnetic properties. These tools rely on the characterization of the polarization state of reflected light from the sample to collect information on i…
View article: Nonlinear harmonics of a seeded free-electron laser as a coherent and ultrafast probe to investigate matter at the water window and beyond
Nonlinear harmonics of a seeded free-electron laser as a coherent and ultrafast probe to investigate matter at the water window and beyond Open
The advent of free-electron lasers (FELs) in the soft- and hard-x-ray spectral regions has introduced the possibility to probe electronic, magnetic, and structural dynamics, in both diluted and condensed matter samples, with femtosecond ti…
View article: Ultrafast time-evolution of chiral Néel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering
Ultrafast time-evolution of chiral Néel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering Open
Non-collinear spin textures in ferromagnetic ultrathin films are attracting a renewed interest fueled by possible fine engineering of several magnetic interactions, notably the interfacial Dzyaloshinskii-Moriya interaction. This allows for…
View article: Element-selective analysis of ultrafast demagnetization in Co/Pt multilayers exhibiting large perpendicular magnetic anisotropy
Element-selective analysis of ultrafast demagnetization in Co/Pt multilayers exhibiting large perpendicular magnetic anisotropy Open
We use time-resolved resonant magnetic scattering experiments to investigate the laser induced demagnetization of Co/Pt multilayers with large perpendicular magnetic anisotropy. Our pump-probe approach, which relies on extreme ultraviolet …
View article: Sub-15-fs X-ray pump and X-ray probe experiment for the study of ultrafast magnetization dynamics in ferromagnetic alloys
Sub-15-fs X-ray pump and X-ray probe experiment for the study of ultrafast magnetization dynamics in ferromagnetic alloys Open
In this paper, we present a new setup for the measurement of element-specific ultrafast magnetization dynamics in ferromagnetic thin films with a sub-15-fs time resolution. Our experiment relies on a split and delay approach which allows u…
View article: Toward ultrafast magnetic depth profiling using time-resolved x-ray resonant magnetic reflectivity
Toward ultrafast magnetic depth profiling using time-resolved x-ray resonant magnetic reflectivity Open
During the last two decades, a variety of models have been developed to explain the ultrafast quenching of magnetization following femtosecond optical excitation. These models can be classified into two broad categories, relying either on …
View article: Ultrafast time-evolution of chiral Néel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering.
Ultrafast time-evolution of chiral Néel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering. Open
Non-collinear spin textures in ferromagnetic ultrathin films are attracting a renewed interest fueled by possible fine engineering of several magnetic interactions, notably the interfacial Dzyaloshinskii-Moriya interaction. This allows the…
View article: Time-resolved XUV absorption spectroscopy and magnetic circular dichroism at the Ni <em>M</em><sub>2,3</sub>-edges
Time-resolved XUV absorption spectroscopy and magnetic circular dichroism at the Ni <em>M</em><sub>2,3</sub>-edges Open
Ultrashort optical pulses can trigger a variety of non-equilibrium processes in magnetic thin films affecting electrons and spins on femtosecond timescales. In order to probe the charge and magnetic degrees of freedom simultaneously, we de…
View article: Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni M2,3-Edges
Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni M2,3-Edges Open
Ultrashort optical pulses can trigger a variety of non-equilibrium processes in magnetic thin films affecting electrons and spins on femtosecond timescales. In order to probe the charge and magnetic degrees of freedom simultaneously, we de…
View article: Simultaneous two-color snapshot view on ultrafast charge and spin dynamics in a Fe-Cu-Ni tri-layer
Simultaneous two-color snapshot view on ultrafast charge and spin dynamics in a Fe-Cu-Ni tri-layer Open
Ultrafast phenomena on a femtosecond timescale are commonly examined by pump-probe experiments. This implies multiple measurements, where the sample under investigation is pumped with a short light pulse and then probed with a second pulse…
View article: Ultrafast time-evolution of magnetic chirality probed by circular dichroism in x-ray resonant magnetic scattering in homochiral skyrmionic systems
Ultrafast time-evolution of magnetic chirality probed by circular dichroism in x-ray resonant magnetic scattering in homochiral skyrmionic systems Open
Noncollinear spin textures in ferromagnetic ultrathin films are attracting a renewed interest fuelled by the discovery of the interfacial Dzyaloshinskii-Moriya (DM) interaction. They are at the origin of complex chiral spin textures such a…
View article: Ultrafast time-evolution of chiral Néel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering
Ultrafast time-evolution of chiral Néel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering Open
Non-collinear spin textures in ferromagnetic ultrathin films are attracting a renewed interest fueled by possible fine engineering of several magnetic interactions, notably the interfacial Dzyaloshinskii-Moriya interaction. This allows the…
View article: Simultaneous two-color snapshot view on ultrafast charge and spin dynamics in a Fe-Cu-Ni tri-layer
Simultaneous two-color snapshot view on ultrafast charge and spin dynamics in a Fe-Cu-Ni tri-layer Open
Ultrafast phenomena on a femtosecond timescale are commonly examined by pump-probe experiments. This implies multiple measurements where the sample under investigation is pumped with a short light pulse and has to be probed with a second p…
View article: Resonant Faraday effect using high-order harmonics for the investigation of ultrafast demagnetization
Resonant Faraday effect using high-order harmonics for the investigation of ultrafast demagnetization Open
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