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Scientific Highlights and News

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Datum
16 February 2021
PLDCDW

Structural involvement in the melting of the charge density wave in 1T-TiSe2

The authors find using resonant and non-resonant x-ray diffraction on an x-ray free electron laser that the structural distortion and the underlying electronic structure of the charge density wave in TiSe2 show different energetics at ultrafast timescales. This indicates that the lattice distortion stabilizes the charge density wave.

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30 November 2020
Magnetic beauty within

Magnetic vortices come full circle

The first experimental observation of three-dimensional magnetic ‘vortex rings’ provides fundamental insight into intricate nanoscale structures inside bulk magnets, and offers fresh perspectives for magnetic devices.

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20 November 2020
Single femtosecond laser pulse excitation of individual cobalt  nanoparticles

Single femtosecond laser pulse excitation of individual cobalt nanoparticles

The interaction of light and magnetism at the nanoscale is a topic of fundamental interest and with potential impact to future spintronics applications. in this work we address theoretically and experimentally the effect of femtosecond laser pulse excitation on the magnetic, structural, and chemical stability of individual magnetic cobalt nanoparticles including the role of the substrate or matrix. Eventually, we discuss possible pathways to achieve laser-induced magnetic switching in individual nanostructures.

This work has been highlighted as "Editors' Suggestion" in Physical Review B.

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9 November 2020
High-resolution X-ray microscopy of a test pattern with 9 nm line width

World Record: 7 nm Resolution in Scanning Soft X-ray Microscopy

During the past decade, scientists have put high effort to achieve sub-10 nm resolution in X-ray microscopy. Recent developments in high-resolution lithography-based diffractive optics, combined with the extreme stability and precision of the PolLux and HERMES scanning X-ray microscopes, resulted now in a so far unreached resolution of seven nanometers in scanning soft X-ray microscopy. Utilizing this highly precise microscopy technique with the X-ray magnetic circular dichroism effect, dimensionality effects in an ensemble of interacting magnetic nanoparticles can be revealed.

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16 October 2020
Pyrophosphate charge/discharge

Enhanced Stability of a Pyrophosphate cathode for Na-ion batteries

The structural changes of Na3.32Fe2.11Ca0.23(P2O7)2 during several charge discharge cycles is viewed by its powder pattern and selected cell parameter evolution.

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30 September 2020
Two-color, twin-focus zone plate

Two-color snapshots of ultrafast charge and spin dynamics

In a joint research effort, an international team of scientists lead by Emmanuelle Jal (Sorbonne Université) performed a time-resolved experiment at the FERMI free-electron laser to disclose the dynamic behavior of two magnetic element of a compount material in only one snapshot. The X-ray Optics and Applications group developed a dedicated optical element for this experiment that is usable with two different photon energies (colors) simultaneously.

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22 September 2020
Thorsten Schmitt (links) und Milan Radovic an ihrer Experimentierstation an der Synchrotron Lichtquelle Schweiz SLS.

Customising an electronic material

Media Releases Research Using Synchrotron Light Materials Research Matter and Material

PSI scientists have investigated a material that could be suitable for future data storage applications. They have manipulated the crystalline structure of their sample while measuring how this affects the material’s magnetic and electronic properties.

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13 August 2020
u1x

X-rays illuminate the particle atomic structure of cyan light emitting 6-monolayers CsPbBr3 nanoplatelets by Total Scattering

A cyan light (492 nm) emitting colloidal suspension of CsPbBr3 nanoplatelets in a flask, together with the high-quality XRPD Total Scattering pattern of the suspension measured at the X04SA-MS beamline and the full-nanoparticle structure thereby inferred.

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9 July 2020
Chern Number

Cherned up to the maximum

In topological materials, electrons can display behaviour that is fundamentally different from that in ‘conventional’ matter, and the magnitude of many such ‘exotic’ phenomena is directly proportional to an entity known as the Chern number. New experiments establish for the first time that the theoretically predicted maximum Chern number can be reached — and controlled — in a real material.

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