Valence electronic structure of the double perovskite Sr2FeMoO6 through resonant x-ray spectroscopies

• Resonant x-ray spectroscopies were used to investigate the double perovskite Sr2FeMoO6 (SFMO) in order to identify the compounds valence electronic structure known for its half-metallicity and ferrimagnetism above room temperature. A comprehensive resonant photoelectron spectroscopy (RPES) and resonant inelastic x-ray scattering (RIXS) study was carried out to acquire a more detailed understanding and interpretation of the valence band electronic structure and hybridization between Fe and Mo d bands. The RPES spectrum clearly show enhancement of Mo d states at the Fermi level that are partly responsible for the metallic behavior. The RPES data at the Fe L3 edge shows strong hybridization with O 2p states as well hybridization with Mo d states. At the same time, characteristic d-d excitations are observed in the RIXS spectra at the Fe L edge indicative of Fe d states of more localized character. Although there are many valid definitions to the valency of the Fe and Mo ions and magnetic moments, the total electronic structure represented through element-resolved x-ray spectroscopies studies distinctly identifies the electronic states that results in its established correlated behavior and half-metallicity.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Physics with spec. in Atomic, Molecular and Condensed Matter Physics

Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik

Publikations- och innehållstyp

vet (ämneskategori)

ovr (ämneskategori)