Photoemission study of praseodymia in its highest oxidation state: The necessity of in situ plasma treatment

Journal Article · Mon Feb 07 00:00:00 EST 2011 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.3516953· OSTI ID:21559998

Schaefer, A; Zielasek, V; Baeumer, M ^[1]; Gevers, S; Wollschlaeger, J ^[2]; Schroeder, T ^[3]; Falta, J ^[4]

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1. Institute of Applied and Physical Chemistry, University of Bremen, Leobener Str. NW2, D-28359 Bremen (Germany)
2. Department of Physics, University of Osnabrueck, Barbarastr. 7, D-49069 Osnabrueck (Germany)
3. IHP, Im Technologiepark 25, D-15236 Frankfurt (Oder) (Germany)
4. Institute of Solid State Physics, University of Bremen, P.O. Box 330440, D-28334 Bremen (Germany)

A cold radio frequency oxygen plasma treatment is demonstrated as a successful route to prepare clean, well-ordered, and stoichiometric PrO{sub 2} layers on silicon. High structural quality of these layers is shown by x-ray diffraction. So far unobserved spectral characteristics in Pr 3d x-ray photoelectron (XP) spectra of PrO{sub 2} are presented as a fingerprint for praseodymia in its highest oxidized state. They provide insight in the electronic ground state and the special role of praseodymia among the rare earth oxides. They also reveal that former XP studies suffered from a significant reduction at the surface.

• OSTI ID: 21559998
• Journal Information: Journal of Chemical Physics, Vol. 134, Issue 5; Other Information: DOI: 10.1063/1.3516953; (c) 2011 American Institute of Physics; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
GROUND STATES
HETEROJUNCTIONS
LAYERS
OXYGEN
PHOTOEMISSION
PLASMA
PRASEODYMIUM OXIDES
RADIOWAVE RADIATION
RARE EARTHS
REDUCTION
SEMICONDUCTOR MATERIALS
SILICON
STOICHIOMETRY
SURFACES
THIN FILMS
X RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
EMISSION
ENERGY LEVELS
FILMS
IONIZING RADIATIONS
MATERIALS
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PRASEODYMIUM COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
SCATTERING
SECONDARY EMISSION
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SPECTROSCOPY