Transition énergétique

Abandon de l’énergie nucléaire, développement de l’énergie solaire et éolienne, production d’énergie à partir de la biomasse, réduction de la consommation d’énergie. D’ici 2050, la Suisse doit atteindre la neutralité climatique. Un objectif ambitieux, rendu plus urgent que jamais par une situation géopolitique de plus en plus difficile. Comment faire pour mettre en place ces prochaines années un approvisionnement énergétique durable et résistant pour la Suisse? Comment les énergies renouvelables peuvent-elles être utilisées de manière optimale? Quelles sont les nouvelles technologies les plus prometteuses? Au PSI, des chercheurs s’efforcent de trouver des réponses à ces questions décisives.

Jisoo Kim receives PSI Thesis Medal 2023

Jisoo Kim receives PSI Thesis Medal 2023

Jisoo Kim receives the PSI Thesis Medal 2023. With this award, PSI recognises outstanding PhD theses, achieving  a high degree of innovation and potentially leading to scientific breakthroughs. Jisoo holds a Master of Science from the Korean Advanced Institute of Science &Technology and defended his thesis entitled “Towards time-resolved X-ray scattering tensor tomography” at ETH Zürich.

Paolo Ansuinelli

Welcome to LXN Paolo Ansuinelli

Herzlich Willkommen Paolo Ansuinelli in LXN!

Unusual ferrimagnetism

Unusual ferrimagnetism in CaFe2O4

Rare ferrimagnet states in a phase competing antiferromagnet.

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Our Group at the PSI Open Doors Event 2022: Discovering Energy Systems Modelling and Sustainability

On Sunday, 23rd of October, the Paul Scherrer Institute opened its doors and invited the public to explore and experience the manyfold topics which are researched at PSI. The Laboratory for Energy Systems Analysis was present at two stations. Read the article to learn more.

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Topological magnetic structures in MnGe: Neutron diffraction and symmetry analysis

From new neutron powder diffraction experiments on the chiral cubic (P213) magnet manganese germanide (MnGe), we analyze all of the possible crystal symmetry-allowed magnetic superstructures that are determined successfully from the data. The incommensurate propagation vectors k of the magnetic structure are found to be aligned with the [100] cubic axes, and correspond to a magnetic periodicity of about 30 Å at 1.8 K. Several maximal crystallographic symmetry magnetic structures are found to fit the data equally well and are presented. These include topologically nontrivial magnetic hedgehog and “skyrmion” structures in multi-k cubic or orthorhombic 3+3 and orthorhombic 3+2 dimensional magnetic superspace groups respectively, with either potentially responsible for topological Hall effect. The presence of orthorhombic distortions in the space group P212121 caused by the transition to the magnetically ordered state does not favor the cubic magnetic hedgehog structure, and leave both orthorhombic hedgehog and skyrmion models as equal candidates for the magnetic structures. We also report on a combined mechanochemical and solid-state chemical route to synthesize MnGe at ambient pressures and moderate temperatures, and compare with samples obtained by the traditional high pressure synthesis.

Schuster periodogram power spectrum obtained from a time-resolved STXM image

From light-years to nanometers: reconstruction of unknown oscillations in STXM

From light-years to nanometers: by repurposing an algorithm originally developed for the investigation of oscillatory dynamics in astronomical objects, scientists have been able to image non-locked dynamical processes at the nanosecond and nanometer scale.

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Magnetic structure of R1/3Sr2/3FeO (R = Pr, Nd)

We present magnetization and neutron powder diffraction studies in the temperature range 2K to 300K for oxygen stoichiometric R1/3Sr2/3FeO (R = Pr and Nd). From full symmetry analysis, we proposed two magnetic models by a combined application of irreducible representations and magnetic space groups. Both models fit equally well the neutron powder diffraction data.

Manuel Guizar-Sicairos at SLS

Manuel Guizar-Sicairos appointed as Associate Professor at EPF Lausanne and head of the Computational X-ray Imaging group at PSI

Dr. Manuel Guizar-Sicairos, currently Senior Scientist at PSI, was appointed as Associate Professor of Physics in EPF Lausanne and head of the Computational X-ray Imaging group in PSI.

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Theorie und Praxis, wie verbinde ich Schule und Lehre?

Die drei Informatik-Lernenden Severin P. (2 Lj), Eli L. und Janik M. (3 Lj.) besuchen die Berufs- und Berufsmaturitätsschule in Baden. Wie sie die Schule mit unserer Arbeit am PSI verbinden oder eben auch nicht erfahrt ihr in diesem Beitrag.

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IEEE Magnetics Society Early Career Award 2023

The IEEE Magnetics Society 2023 Early Career Award goes to Claire Donnelly, a former member of LMX and the Mesoscopic Systems Group, for her excellent work on developing x-ray techniques for imaging magnetic structures in three dimensions.

Food CO2 footprint and resource usage

Food COfootprint and resource usage

Multiple-use vs. single-use supplies

Multiple-use vs. single-use supplies

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The ecology of food

Trying to reduce your own impact on the environment is not easy, but one of the best ways to start is to look at your eating habits.

2022 Fa-Best

Vorausscheidung FA-BEST Aargau und Solothurn

Am Samstag, 12.11.2022 fand an der OdA in Brugg die Vorausscheidung von FA-BEST statt. Unsere ehemalige Lernende Fiona Jetzer hat daran teilgenommen.

X-ray pump / X-ray probe scheme

Tracking chemical bond changes with element selectivity and in real time

X-ray photoelectron spectroscopy probes the chemical environment in a molecule at a specific atomic site. Now the concept is extended with a site selective trigger to follow chemical bond changes as they occur on the femtosecond time scale.