Valence changes and core-level shifts of Sm adsorbed on Mo(110)

Journal Article · Fri Sep 15 04:00:00 EDT 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.5916· OSTI ID:5651770

Stenborg, A; Bjorneholm, O; Nilsson, A; Martensson, N ^[1]; Andersen, J N; Wigren, C ^[2]

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1. Department of Physics, Uppsala University, P.O. Box 530, S-75121 Uppsala, Sweden (SE)
2. MAX-lab, Lund University, P.O. Box 118, S-22100 Lund, Sweden

The valence state and 4{ital f} core-level shifts of the system Sm/Mo(110) have been investigated by means of photoelectron spectroscopy. The experiments were performed at the MAX synchrotron radiation facility in Lund. The spectra are used to discuss the properties of the overlayer structures. A valence transition from Sm{sup 2+} at low coverages to Sm{sup 3+} at high coverages occurs. An ordered {ital c}(7{times}2) submonolayer structure is found to be of mixed valence (heterogeneous or homogeneous). A divalent Sm surface appears above one monolayer. The growth mode is found to be essentially layer by layer.

• OSTI ID: 5651770
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 39:9; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ADSORPTION
BINDING ENERGY
CRYSTAL GROWTH
CRYSTAL STRUCTURE
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
ENERGY LEVELS
EPITAXY
F STATES
LAYERS
METALS
MOLYBDENUM
PHOTOELECTRON SPECTROSCOPY
RARE EARTHS
SAMARIUM
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS
VALENCE