Strong 5f Ferromagnetism in UH3-Based Materials

Several diverse types of UH3-based hydrides can be prepared by hydrogenation of bcc Ubased alloys. Pair Distribution Function (PDF) analysis using high-energy X-rays identified that the (UH3)(1-x)Mo-x hydrides are nanocrystalline, with the structure motif based mainly on the UH3 structure alpha-UH3 represents a minority component. On the other hand, PDF of the (UH3)(1-x)Zr-x hydrides corresponds well to the-UH3 crystal structure. All the hydrides are ferromagnetic, with the Curie temperature TC reaching up to 203 K.