Explanipedia

Magnetodynamics in exchange coupled composite magnets Open

Richa Bhardwaj, Antonio Caretta, Simone Laterza, Gabriele Coltrioli, Francesco Cautero , et al. · 2025

Circular dichroism experiments at the edge of magnetic transition metals enabled by elliptically polarized pulses from a seeded free-electron laser Open

Carlo Spezzani, A. Ravindran, E. Allaria, L. Badano, Richa Bhardwaj , et al. · 2024

International audience

Doping dependent intrinsic magnetization in silicon in Ni/Si heterostructures Open

Simone Laterza, Antonio Caretta, Richa Bhardwaj, Paolo Moras, N. Zema , et al. · 2024

Ultrafast response of Ge2Sb2Te5 nanoparticles: The benefits of low energy amorphization switching with the same read/write speed of bulk memories Open

Antonio Caretta, Barbara Casarin, Bin Chen, Bart J. Kooi, Marco Malvestuto · 2023

We investigate the ultrafast response of crystalline Ge2Sb2Te5 nanoparticles (NPs) below the phase transformation threshold fluence. The observed rapid change of the optical response and the presence of coherent optical phonons are consist…

Harnessing the magnetic proximity effect: induced spin polarization in Ni/Si interfaces Open

Simone Laterza, Antonio Caretta, Richa Bhardwaj, Paolo Moras, N. Zema , et al. · 2023

The investigation of the properties of metal-semiconductor interfaces has gained significant attention due to the unique features that emerge from the combination of both metal and semiconductor attributes. In this report, the magnetic pro…

Evidence of silicide at the Ni/-Si3N4(0001)/Si(111) interface Open

Piu Rajak, Regina Ciancio, Antonio Caretta, Simone Laterza, Richa Bhardwaj , et al. · 2023

We present a study of a sub-nanometre interlayer of crystalline silicon nitride at the Ni/Si interface. We performed transmission electron microscopy measurements complemented by energy dispersive X-ray analysis to investigate to what exte…

The MagneDyn beamline at the FERMI free electron laser Open

Marco Malvestuto, Antonio Caretta, Richa Bhardwaj, Simone Laterza, F. Parmigiani , et al. · 2022

The scope of this paper is to outline the main marks and performances of the MagneDyn beamline, which was designed and built to perform ultrafast magnetodynamic studies in solids. Open to users since 2019, MagneDyn operates with variable c…

All-optical spin injection in silicon investigated by element-specific time-resolved Kerr effect Open

Simone Laterza, Antonio Caretta, Richa Bhardwaj, R. Flammini, Paolo Moras , et al. · 2022

Understanding how a spin current flows across metal-semiconductor interfaces at pico- and femtosecond time scales is of paramount importance for ultrafast spintronics, data processing, and storage applications. However, the possibility to …

Nonlinear harmonics of a seeded free-electron laser as a coherent and ultrafast probe to investigate matter at the water window and beyond Open

G. Penco, Giovanni Perosa, E. Allaria, L. Badano, Filippo Bencivenga , et al. · 2022

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…

Evidence of Silicides at the Ni/Β-Si3n4(0001)/Si(111) Interface Open

Piu Rajak, Regina Ciancio, Antonio Caretta, Simone Laterza, Marco Malvestuto , et al. · 2022

All-optical spin injection in silicon revealed by element specific time-resolved Kerr effect Open

Simone Laterza, Antonio Caretta, Richa Bhardwaj, R. Flammini, Paolo Moras , et al. · 2021

Understanding how a spin current flows across metal-semiconductor interfaces at pico- and femtosecond timescales has implications for ultrafast spintronics, data processing and storage applications. However, the possibility to directly acc…

A novel free-electron laser single-pulse Wollaston polarimeter for magneto-dynamical studies Open

Antonio Caretta, Simone Laterza, Valentina Bonanni, R. Sergo, Carlo Dri , et al. · 2021

Here, we report on the conceptual design, the hardware realization, and the first experimental results of a novel and compact x-ray polarimeter capable of a single-pulse linear polarization angle detection in the extreme ultraviolet photon…

Nanoscale Transient Magnetization Gratings Created and Probed by Femtosecond Extreme Ultraviolet Pulses Open

Dmitriy Ksenzov, A. A. Maznev, Vivek Unikandanunni, Filippo Bencivenga, Flavio Capotondi , et al. · 2021

We utilize coherent femtosecond extreme ultraviolet (EUV) pulses from a free electron laser (FEL) to generate transient periodic magnetization patterns with periods as short as 44 nm. Combining spatially periodic excitation with resonant p…

Nanoscale transient magnetization gratings excited and probed by femtosecond extreme ultraviolet pulses Open

Dmitriy Ksenzov, A. A. Maznev, V. Unni, Filippo Bencivenga, Flavio Capotondi , et al. · 2020

We utilize coherent femtosecond extreme ultraviolet (EUV) pulses derived from a free electron laser (FEL) to generate transient periodic magnetization patterns with periods as short as 44 nm. Combining spatially periodic excitation with re…

Coherent soft X-ray pulses from an echo-enabled harmonic generation free-electron laser Open

Primož Rebernik Ribič, A. Abrami, L. Badano, Maurizio Bossi, Hans-Heinrich Braun , et al. · 2019

X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions fr…

Direct observation of spin-orbit-induced hybridization via resonant inelastic extreme ultraviolet scattering on an edge-sharing cuprate Open

Marco Malvestuto, Antonio Caretta, Barbara Casarin, R. Ciprian, Martina Dell’Angela , et al. · 2019

Using high resolution resonant inelastic x-ray scattering measurements, we have observed that the orbital excitations of the quasi-1D spin chain compound CuGeO₃ has nontrivial and noticeable orbital mixing effects from 3d valenc…

Status and Perspectives of the FERMI FEL Facility (2019) Open

L. Giannessi, E. Allaria, L. Badano, Filippo Bencivenga, Carlo Callegari , et al. · 2019

FERMI is the seeded Free Electron Laser (FEL) user facility at the Elettra laboratory in Trieste, operating in the VUV to EUV and soft X-rays spectral range; the radiation produced by the seeded FEL is characterized by wavelength stability…

First Lasing of a Free Electron Laser in the Soft X-Ray Spectral Range with Echo Enabled Harmonic Generation Open

E. Allaria, A. Abrami, L. Badano, Maurizio Bossi, Hans-Heinrich Braun , et al. · 2019

We report on the successful operation of a Free Electron Laser (FEL) in the Echo Enabled Harmonic Generation (EEHG) scheme at the FERMI facility at Sincrotrone Trieste. The experiment required a modification of the FEL-2 undulator line whi…

Heuristic data analysis for photon detection in single shot RIXS at a Free Electron Laser Open

Simone Laterza, Antonio Caretta, Barbara Casarin, R. Ciprian, Martina Dell’Angela , et al. · 2018

A heuristic method based on an image recognition approach has been developed for fast and efficient processing of single shot FEL RIXS spectra.

Heuristic data analysis for photon detection in single shot RIXS at a\n Free Electron Laser Open

Simone Laterza, Antonio Caretta, Barbara Casarin, R. Ciprian, Martina Dell’Angela , et al. · 2018

A heuristic method based on an image recognition approach has been developed\nfor fast and efficient processing of single shot FEL RIXS spectra.\n

Ultralow-fluence single-shot optical crystalline-to-amorphous phase transition in Ge–Sb–Te nanoparticles Open

Barbara Casarin, Antonio Caretta, Bin Chen, Bart J. Kooi, R. Ciprian , et al. · 2018

Ge₂Sb₂Te₅ crystalline nanoparticles amorphize through a single laser pulse with exceptional low fluence, boosting the energetics of a phase-change process.

High-resolution resonant inelastic extreme ultraviolet scattering from orbital and spin excitations in a Heisenberg antiferromagnet Open

Antonio Caretta, Martina Dell’Angela, Yi‐De Chuang, A. M. Kalashnikova, R. V. Pisarev , et al. · 2017

We report the high resolution resonant inelastic EUV scattering study of\nquantum Heisenberg antiferromagnet KCoF3. By tuning the EUV photon energy to\ncobalt M23 edge, a complete set of low energy 3d spin-orbital excitations is\nrevealed.…

Development Perspectives at FERMI Open

M. Svandrlik, E. Allaria, L. Badano, Filippo Bencivenga, Carlo Callegari , et al. · 2017

FERMI is the seeded Free Electron Laser (FEL) user facility at the Elettra laboratory in Trieste, operating in the ultraviolet to soft X-rays spectral range; the radiation produced by the seeded FEL is characterized by a number of desirabl…

Extreme ultraviolet resonant inelastic X-ray scattering (RIXS) at a seeded free-electron laser Open

Martina Dell’Angela, F. Hieke, Marco Malvestuto, Luca Sturari, S. Bajt , et al. · 2016

In the past few years, we have been witnessing an increased interest for studying materials properties under non-equilibrium conditions. Several well established spectroscopies for experiments in the energy domain have been successfully ad…

Ultrafast Ge-Te bond dynamics in a phase-change superlattice Open

Marco Malvestuto, Antonio Caretta, Barbara Casarin, Federico Cilento, Martina Dell’Angela , et al. · 2016

A long-standing question for avant-garde data storage technology concerns the nature of the ultrafast photoinduced phase transformations in the wide class of chalcogenide phase-change materials (PCMs). Overall, a comprehensive understandin…

Interband characterization and electronic transport control of nanoscaledsuperlattices Open

Antonio Caretta, Barbara Casarin, Paola Di Pietro, A. Perucchi, S. Lupi , et al. · 2016

The extraordinary electronic and optical properties of the crystal-to-amorphous transition in phase-change materials have led to important developments in memory applications. A promising outlook is offered \nby nanoscaling such phase-chan…

Revisiting the Local Structure in Ge-Sb-Te based Chalcogenide Superlattices Open

Barbara Casarin, Antonio Caretta, Jamo Momand, Bart J. Kooi, Marcel A. Verheijen , et al. · 2016

Fermi Upgrade Plans Open

Alessandro Fabris, E. Allaria, L. Badano, Filippo Bencivenga, Carlo Callegari , et al. · 2016

FERMI has reached its nominal performance on both FEL lines, FEL-1 (12 eV to 62 eV) and FEL-2 (62 eV to 310 eV). After a brief overview of the activities with users, we will describe plans for LINAC , FEL and beamline upgrades for 2016-201…

New strategy for magnetic gas sensing Open

R. Ciprian, Piero Torelli, Angelo Giglia, B. Gobaut, B. Ressel , et al. · 2016

New strategy for room temperature magnetic gas sensing based on magnetoelectrically-coupled hybrids. The sensor is sensitive, fast and cost-effective. The sensing is allowed thanks to the magneto-electric coupling at the interface.

MagneDyn: the beamline for magneto dynamics studies at FERMI Open

Cristian Svetina, Nicola Mahne, Lorenzo Raimondi, Antonio Caretta, Barbara Casarin , et al. · 2015

The future Magneto Dynamics (MagneDyn) beamline will be devoted to study the electronic states and the local magnetic properties of excited and transient states of complex systems by means of the time-resolved X-ray absorption spectroscopy…

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