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Title: Actinide--noble-metal systems: An x-ray-photoelectron-spectroscopy study of thorium-platinum, uranium-platinum, and uranium-gold intermetallics

Abstract

A systematic study of the valence bands and selected core levels of polycrystalline samples of the intermetallic compounds ThPt, ThPt/sub 2/, ThPt/sub 3/, UPt, UPt/sub 2/, UPt/sub 3/, UPt/sub 5/, UAu/sub 3/, and U/sub 2/Au/sub 3/ has been performed by x-ray-photoelectron spectroscopy using Al K..cap alpha.. radiation. The 5f electron states are found to be pinned to the Fermi energy in all uranium compounds suggesting a band description for these states. From the measured binding energies together with experimentally determined work functions a charge transfer from Th and U to the noble metals is concluded to take place. The highly asymmetric line shape of the U 4f core level is discussed and is found to be due to the high density of occupied and empty states near the Fermi energy. In the uranium-gold system the presence of a Kotani-Toyozawa satellite indicates the onset of a more localized 5f-electron behavior. Magnetization measurements give support to the itinerant nature of the 5f electrons in the uranium-platinum compounds.

Authors:
;
Publication Date:
Research Org.:
Institut fuer Atom- und Festkoerperphysik der Freien Universitaet Berlin, 1000 Berlin 33, Boltzmannstrasse 20, West Germany
OSTI Identifier:
6698365
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B: Condens. Matter; (United States)
Additional Journal Information:
Journal Volume: 23:3
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; PLATINUM ALLOYS; PHOTOELECTRON SPECTROSCOPY; THORIUM ALLOYS; GOLD ALLOYS; URANIUM ALLOYS; BINDING ENERGY; ENERGY LEVELS; ENERGY-LEVEL DENSITY; INTERMETALLIC COMPOUNDS; LINE WIDTHS; MAGNETIZATION; WORK FUNCTIONS; X RADIATION; ACTINIDE ALLOYS; ALLOYS; ELECTROMAGNETIC RADIATION; ELECTRON SPECTROSCOPY; ENERGY; FUNCTIONS; IONIZING RADIATIONS; PLATINUM METAL ALLOYS; RADIATIONS; SPECTROSCOPY; 360104* - Metals & Alloys- Physical Properties

Citation Formats

Schneider, W, and Laubschat, C. Actinide--noble-metal systems: An x-ray-photoelectron-spectroscopy study of thorium-platinum, uranium-platinum, and uranium-gold intermetallics. United States: N. p., 1981. Web. doi:10.1103/PhysRevB.23.997.
Schneider, W, & Laubschat, C. Actinide--noble-metal systems: An x-ray-photoelectron-spectroscopy study of thorium-platinum, uranium-platinum, and uranium-gold intermetallics. United States. https://doi.org/10.1103/PhysRevB.23.997
Schneider, W, and Laubschat, C. Sun . "Actinide--noble-metal systems: An x-ray-photoelectron-spectroscopy study of thorium-platinum, uranium-platinum, and uranium-gold intermetallics". United States. https://doi.org/10.1103/PhysRevB.23.997.
@article{osti_6698365,
title = {Actinide--noble-metal systems: An x-ray-photoelectron-spectroscopy study of thorium-platinum, uranium-platinum, and uranium-gold intermetallics},
author = {Schneider, W and Laubschat, C},
abstractNote = {A systematic study of the valence bands and selected core levels of polycrystalline samples of the intermetallic compounds ThPt, ThPt/sub 2/, ThPt/sub 3/, UPt, UPt/sub 2/, UPt/sub 3/, UPt/sub 5/, UAu/sub 3/, and U/sub 2/Au/sub 3/ has been performed by x-ray-photoelectron spectroscopy using Al K..cap alpha.. radiation. The 5f electron states are found to be pinned to the Fermi energy in all uranium compounds suggesting a band description for these states. From the measured binding energies together with experimentally determined work functions a charge transfer from Th and U to the noble metals is concluded to take place. The highly asymmetric line shape of the U 4f core level is discussed and is found to be due to the high density of occupied and empty states near the Fermi energy. In the uranium-gold system the presence of a Kotani-Toyozawa satellite indicates the onset of a more localized 5f-electron behavior. Magnetization measurements give support to the itinerant nature of the 5f electrons in the uranium-platinum compounds.},
doi = {10.1103/PhysRevB.23.997},
url = {https://www.osti.gov/biblio/6698365}, journal = {Phys. Rev. B: Condens. Matter; (United States)},
number = ,
volume = 23:3,
place = {United States},
year = {1981},
month = {2}
}