Thomas LaGrange
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View article: Sub-10 nm Quantification of Spin and Orbital Magnetic Moment Across the Metamagnetic Phase Transition in FeRh Using EMCD
Sub-10 nm Quantification of Spin and Orbital Magnetic Moment Across the Metamagnetic Phase Transition in FeRh Using EMCD Open
Electron magnetic circular dichroism (EMCD) in transmission electron microscopy (TEM) enables element-specific measurement of spin and orbital magnetic moments, analogous to X-ray magnetic circular dichroism (XMCD). While the EMCD techniqu…
View article: Realization of a Pre-Sample Photonic-Based Free-Electron Modulator in Ultrafast Transmission Electron Microscopes
Realization of a Pre-Sample Photonic-Based Free-Electron Modulator in Ultrafast Transmission Electron Microscopes Open
Spatial and temporal light modulation is a well-established technology that enables dynamic shaping of the phase and amplitude of optical fields, significantly enhancing the resolution and sensitivity of imaging methods. Translating this c…
View article: Unifying frequency metrology across microwave, optical, and free-electron domains
Unifying frequency metrology across microwave, optical, and free-electron domains Open
View article: Dislocation-Driven Nucleation Type Switching Across Repeated Ultrafast Magnetostructural Phase Transition
Dislocation-Driven Nucleation Type Switching Across Repeated Ultrafast Magnetostructural Phase Transition Open
Controlling magnetic order on ultrafast timescales, driven by spintronic and recording applications, is one of the main directions of current research in magnetism. Despite major advances in understanding the temporal evolution of magnetic…
View article: High‐Entropy Magnetism of Murunskite
High‐Entropy Magnetism of Murunskite Open
Murunskite (K 2 FeCu 3 S 4 ) bridges the two known families of high‐temperature superconductors, cuprates and iron‐pnictides, structurally and electronically. Like these families, murunskite exhibits an antiferromagnetic (AF)‐like response…
View article: Ultrafast momentum-resolved visualization of the interplay between phonon-mediated scattering and plasmons in graphite
Ultrafast momentum-resolved visualization of the interplay between phonon-mediated scattering and plasmons in graphite Open
Scattering between charges and collective modes in materials governs phenomena such as electrical resistance, energy dissipation, and phase switching. Studying such scattering requires simultaneous access to ultrafast and momentum-resolved…
View article: Realization of a Pre-Sample Photonic-based Free-Electron Modulator in Ultrafast Transmission Electron Microscopes
Realization of a Pre-Sample Photonic-based Free-Electron Modulator in Ultrafast Transmission Electron Microscopes Open
Spatial and temporal light modulation is a well-established technology that enables dynamic shaping of the phase and amplitude of optical fields, significantly enhancing the resolution and sensitivity of imaging methods. Translating this c…
View article: Dataset of "Ultrafast momentum-resolved visualization of the interplay between phonon-mediated scattering and plasmons in graphite"
Dataset of "Ultrafast momentum-resolved visualization of the interplay between phonon-mediated scattering and plasmons in graphite" Open
UED_RAW_sorted: During the experiment, we scanned along the delay stage to vary the time delay between the pump and the probe. Each h5 file contains two diffraction patterns (pump on and pump off) of one second of exposure at a given delay…
View article: Ultrafast generation of hidden phases via energy-tuned electronic photoexcitation in magnetite
Ultrafast generation of hidden phases via energy-tuned electronic photoexcitation in magnetite Open
Phase transitions occurring in nonequilibrium conditions can evolve through high-energy intermediate states inaccessible via equilibrium adiabatic conditions. Because of the subtle nature of such hidden phases, their direct observation is …
View article: Unifying frequency metrology across microwave, optical, and free-electron domains
Unifying frequency metrology across microwave, optical, and free-electron domains Open
Frequency metrology lies at the heart of precision measurement. Optical frequency combs provide a coherent link uniting the microwave and optical domains in the electromagnetic spectrum, with profound implications in timekeeping, sensing a…
View article: High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source
High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source Open
The time- and angle-resolved photoemission spectroscopy (trARPES) allows for direct mapping of the electronic band structure and its dynamic response on femtosecond timescales. Here, we present a new ARPES system, powered by a new fiber-ba…
View article: Electron-photon quantum interaction enables novel ultrafast electron imaging approaches
Electron-photon quantum interaction enables novel ultrafast electron imaging approaches Open
View article: Enhanced Free-Electron Wavefunction Modulation via Photon-Induced Near-Field Electron Microscopy (PINEM) with Shaped Light Fields
Enhanced Free-Electron Wavefunction Modulation via Photon-Induced Near-Field Electron Microscopy (PINEM) with Shaped Light Fields Open
View article: Dataset of "High-resolution MHz trARPES based on a tunable VUV source"
Dataset of "High-resolution MHz trARPES based on a tunable VUV source" Open
This upload includes the experimentally measured data on Au111, Bi2Se3, and TaTe2 by time- and angle-resolved photoemission spectroscopy, as well as a laser spectrum of the Y-Fi VUV laser system.
View article: Dataset of "High-resolution MHz trARPES based on a tunable VUV source"
Dataset of "High-resolution MHz trARPES based on a tunable VUV source" Open
This upload includes the experimentally measured data on Au111, Bi2Se3, and TaTe2 by time- and angle-resolved photoemission spectroscopy, as well as a laser spectrum of the Y-Fi VUV laser system.
View article: Light‐Induced Metastable Hidden Skyrmion Phase in the Mott Insulator Cu<sub>2</sub>OSeO<sub>3</sub>
Light‐Induced Metastable Hidden Skyrmion Phase in the Mott Insulator Cu<sub>2</sub>OSeO<sub>3</sub> Open
The discovery of a novel long‐lived metastable skyrmion phase in the multiferroic insulator Cu 2 OSeO 3 visualized with Lorentz transmission electron microscopy for magnetic fields below the equilibrium skyrmion pocket is reported. This ph…
View article: Unraveling the sign reversal of the anomalous Hall effect in ferromagnet/heavy-metal ultrathin films
Unraveling the sign reversal of the anomalous Hall effect in ferromagnet/heavy-metal ultrathin films Open
The sign reversal in the anomalous Hall effect (AHE) that occurs for material offers great prospects for AHE-based spintronic devices design. However, the mechanisms are still controversial in ultrathin ferromagnetic/heavy metal thin film …
View article: Charge Dynamics Electron Microscopy: Nanoscale Imaging of Femtosecond Plasma Dynamics
Charge Dynamics Electron Microscopy: Nanoscale Imaging of Femtosecond Plasma Dynamics Open
Understanding and actively controlling the spatiotemporal dynamics of nonequilibrium electron clouds is fundamental for the design of light and electron sources, high-power electronic devices, and plasma-based applications. However, electr…
View article: High-speed multiframe dynamic transmission electron microscope image acquisition system with arbitrary timing
High-speed multiframe dynamic transmission electron microscope image acquisition system with arbitrary timing Open
An electron microscope is disclosed which has a laser-driven photocathode and an arbitrary waveform generator (AWG) laser system ("laser"). The laser produces a train of temporally-shaped laser pulses of a predefined pulse duration and wav…
View article: Nanoscale mechanism of uranium reduction by magnetite
Nanoscale mechanism of uranium reduction by magnetite Open
View article: Imaging the Ultrafast Coherent Control of a Skyrmion Crystal
Imaging the Ultrafast Coherent Control of a Skyrmion Crystal Open
Exotic magnetic textures emerging from the subtle interplay between thermodynamic and topological fluctuation have attracted intense interest due to their potential applications in spintronic devices. Recent advances in electron microscopy…
View article: Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3
Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3 Open
We report the discovery of a novel skyrmion phase in the multiferroic insulator Cu2OSeO3 for magnetic fields below the equilibrium skyrmion pocket. This phase can be accessed by exciting the sample out of equilibrium with near-infrared (NI…
View article: Analytics at the nanometer and nanosecond scales by short electron pulses in an electron microscope
Analytics at the nanometer and nanosecond scales by short electron pulses in an electron microscope Open
View article: Ultrafast Transverse Modulation of Free Electrons by Interaction with Shaped Optical Fields
Ultrafast Transverse Modulation of Free Electrons by Interaction with Shaped Optical Fields Open
Spatiotemporal electron-beam shaping is a bold frontier of electron microscopy. Over the past decade, shaping methods evolved from static phase plates to low-speed electrostatic and magnetostatic displays. Recently, a swift change of parad…
View article: Tuning Topological Spin Textures in Size-Tailored Chiral Magnet Insulator Particles
Tuning Topological Spin Textures in Size-Tailored Chiral Magnet Insulator Particles Open
Topological spin textures such as skyrmions hold high potential for use as magnetically active elements in diverse near-future applications. While skyrmions in metallic multilayers attract great attention in this context, unleashing the my…
View article: Tuning topological spin textures in size-tailored chiral magnet insulator particles
Tuning topological spin textures in size-tailored chiral magnet insulator particles Open
Topological spin textures such as skyrmions hold high potential for use as magnetically active elements in diverse near-future applications. While skyrmions in metallic multilayers attract great attention in this context, unleashing the my…
View article: Tuning topological spin textures in size-tailored chiral magnet insulator particles
Tuning topological spin textures in size-tailored chiral magnet insulator particles Open
The file contains the raw data and code used for the paper entitled "Tuning topological spin textures in size-tailored chiral magnet insulator particles" by Priya R. Baral et al. to be published in Journal of Physical Chemistry C. Requests…
View article: Tuning topological spin textures in size-tailored chiral magnet insulator particles
Tuning topological spin textures in size-tailored chiral magnet insulator particles Open
The file contains the raw data and code used for the paper entitled "Tuning topological spin textures in size-tailored chiral magnet insulator particles" by Priya R. Baral et al. to be published in Journal of Physical Chemistry C. Requests…
View article: Charge dynamics electron microscopy: nanoscale imaging of femtosecond plasma dynamics
Charge dynamics electron microscopy: nanoscale imaging of femtosecond plasma dynamics Open
Understanding and actively controlling the spatio-temporal dynamics of non-equilibrium electron clouds is fundamental for the design of light and electron sources, novel high-power electronic devices, and plasma-based applications. However…
View article: Charge dynamics electron microscopy: nanoscale imaging of femtosecond plasma dynamics
Charge dynamics electron microscopy: nanoscale imaging of femtosecond plasma dynamics Open
Understanding and actively controlling the spatio-temporal dynamics of non-equilibrium electron clouds is fundamental for the design of light and electron sources, novel high-power electronic devices, and plasma-based applications. However…