Institut des Matériaux Jean Rouxel

Trace elements analysis of 16th-century silver coins minted in Nantes - coupled HE-PIXE and p-XRF measurements

Previous studies have identified the origin of silver extracted from South American mines -Mexico and Potosí- and its circulation through trade between Spain and France during the second half of the 16th century. In this context, a selection of silver coins minted in Nantes was a...

Hierarchical quasiparticle dynamics in antiferromagnets revealed by time- and momentum-resolved X-ray scattering

Abstract Energy flows among coupled subsystems are essential for ultrafast dynamics and high-speed technologies. In magnetic materials, spin fluctuations —magnons— mediate these flows in ultrafast magnetism. Yet momentum-resolved access to low-energy magnons governing the microsc...

Tuning the Activation Barrier for Oxygen Exchange on Mixed Conducting Oxide with Fine Control of Transition Metal Impurities

Abstract The energy barrier for oxygen exchange at the surface of mixed conducting oxides is a multifactor term that remains difficult to predict with existing models. Here, we describe an experimental approach to fine-tune this barrier on Pr0.1Ce0.9O2-δ used as a model mixed con...

Super‐Electron‐Donor Polymers: From Monomer Design to Redox Functionality

ABSTRACT The design flexibility of organic materials has enabled numerous applications for energy storage systems. However, few examples of low‐potential p‐type materials for the negative electrode are known in the field of organic batteries, particularly relevant for anion‐rocki...

Structural Responses of Aluminoborosilicate Glasses to Pressure and Iodine Incorporation: An Advanced NMR Investigation

ABSTRACT Iodine‐129 is a critical challenge for nuclear waste immobilization due to its high mobility and extremely long half‐life (1.57 × 10 7 years). Although high‐pressure glass synthesis has been shown to significantly enhance iodine solubility, the structural mechanisms gove...