Much more to explore with an oxidation state of nearly four: Pr valence instability in intermetallic m-Pr₂Co₃Ge₅.

ABSTRACT: For some intermetallic compounds containing lanthanides, structural transitions can result in intermediate electronic states between trivalency and tetravalency; however, this is rarely observed for praseodymium compounds. The dominant trivalency of praseodymium limits potential discoveries of emergent quantum states in itinerant 4f¹ systems accessible using Pr⁴⁺-based compounds. Here, we use in situ powder x-ray diffraction and in situ electron energy-loss spectroscopy (EELS) to identify an intermetallic example of a dominantly Pr⁴⁺ state in the polymorphic system Pr₂Co₃Ge₅. The structure-valence transition from a nearly full Pr⁴⁺ electronic state to a typical Pr³⁺ state shows the potential of P

SUBMITTER: Kyrk TM 

PROVIDER: S-EPMC10816709 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature