9 4 H I G H L I G H T S 2 0 2 2 I

S C I E N T I F I C H I G H L I G H T S

E L E C T R O N I C S T R U C T U R E , M A G N E T I S M A N D D Y N A M I C S

All beamlines of the Electronic Structure, Magnetism and Dynamics (EMD) group were fully operational in 2022, and staff are excited to welcome back users face-to-face at the experimental stations.

Beamline ID12 provides a number of experimental end- stations to study element-selective magnetic properties of matter under multiple extreme conditions of high magnetic field, low temperature and high pressure using X-ray magnetic circular dichroism (XMCD). However, often XMCD results are difficult to compare with macroscopic data that may be obtained on different samples and under different experimental conditions. To overcome this difficulty, the team on ID12, in collaboration with researchers from TU Darmstadt and the University Duisburg-Essen in Germany, have developed a new instrument, ULMAG ULtimate MAGnetic characterisation , which offers the unique possibility to measure under the same experimental conditions XMCD and macroscopic properties: magnetisation, magnetostriction, magnetotransport and caloric properties of bulk magnetic materials. This new instrument will nicely complement the high-field XMCD end-station based on a 17T superconducting solenoid. Extensive scientific use of the latter is illustrated by elucidating the key parameters governing the interplay between magnetism and conductivity in coordination solids by Perlepe et al. (page 96) and unravelling the origin of the intermediate spin ground state in a Cr10 single molecule magnet by Rubín et al. (page 97).

Beamline ID20 provides spectrometers for resonant and non-resonant inelastic X-ray scattering experiments. This year, beamline staff introduced new data extraction and analysis tools that will facilitate data reduction and analysis by the users. This new software unifies data analysis approaches for all techniques offered at ID20 in preparation for the new control system, BLISS, which will be installed in the coming years. Raimondi et al. used X-ray Raman scattering spectroscopy at the oxygen K-edge to elucidate the hydration properties of protonic ceramic fuel and electrolysis cells (page 99). Revelli et al. unravelled the character of the magnetic moments of the spin-orbit entangled quasimolecular dimer orbitals in the spin-liquid candidate Ba3InIr2O9 using RIXS interferometry at the Ir L3-edge (page 100).