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Title: Binding energies and work-function changes in Eu/sub x/La/sub 1en-dashx/Al/sub 2/ compounds studied by x-ray photoelectron spectroscopy

Abstract

The intermetallic compound Eu/sub x/La/sub 1en-dashx/Al/sub 2/ has been studied by x-ray photoelectron spectroscopy with Al K..cap alpha.. radiation at concentrations x=0, 0.03, 0.1, and 1. The dependence of the Eu-4f line shape on the partial density of states at the Fermi energy is discussed. The Eu-4f excitation energy in the compounds was found to be ..delta../sub -/=1.0 +- 0.1 eV independent of the Eu concentration. This is 0.9 eV smaller than the value reported for metallic Eu. The energy shift is mainly due to Fermi-energy changes as confirmed by work-function measurements of the samples. The resultant shift is discussed in terms of charge transfer together with existing Moessbauer-isomer-shift data.

Authors:
;
Publication Date:
Research Org.:
Institut fuer Atom- und Festkoerperphysik der Freien Universitaet Berlin, Boltzmannstrasse 20, 1000 Berlin 33, Germany
OSTI Identifier:
5775319
Resource Type:
Journal Article
Journal Name:
Phys. Rev., B: Condens. Matter; (United States)
Additional Journal Information:
Journal Volume: 20:11
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; BINDING ENERGY; ENERGY-LEVEL DENSITY; FERMI LEVEL; PHOTOELECTRON SPECTROSCOPY; WORK FUNCTIONS; EUROPIUM ALLOYS; LANTHANUM ALLOYS; EXCITATION; INTERMETALLIC COMPOUNDS; QUANTITY RATIO; ALLOYS; ELECTRON SPECTROSCOPY; ENERGY; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; RARE EARTH ALLOYS; SPECTROSCOPY; 360104* - Metals & Alloys- Physical Properties

Citation Formats

Schneider, W D, and Laubschat, C. Binding energies and work-function changes in Eu/sub x/La/sub 1en-dashx/Al/sub 2/ compounds studied by x-ray photoelectron spectroscopy. United States: N. p., 1979. Web. doi:10.1103/PhysRevB.20.4416.
Schneider, W D, & Laubschat, C. Binding energies and work-function changes in Eu/sub x/La/sub 1en-dashx/Al/sub 2/ compounds studied by x-ray photoelectron spectroscopy. United States. https://doi.org/10.1103/PhysRevB.20.4416
Schneider, W D, and Laubschat, C. Sat . "Binding energies and work-function changes in Eu/sub x/La/sub 1en-dashx/Al/sub 2/ compounds studied by x-ray photoelectron spectroscopy". United States. https://doi.org/10.1103/PhysRevB.20.4416.
@article{osti_5775319,
title = {Binding energies and work-function changes in Eu/sub x/La/sub 1en-dashx/Al/sub 2/ compounds studied by x-ray photoelectron spectroscopy},
author = {Schneider, W D and Laubschat, C},
abstractNote = {The intermetallic compound Eu/sub x/La/sub 1en-dashx/Al/sub 2/ has been studied by x-ray photoelectron spectroscopy with Al K..cap alpha.. radiation at concentrations x=0, 0.03, 0.1, and 1. The dependence of the Eu-4f line shape on the partial density of states at the Fermi energy is discussed. The Eu-4f excitation energy in the compounds was found to be ..delta../sub -/=1.0 +- 0.1 eV independent of the Eu concentration. This is 0.9 eV smaller than the value reported for metallic Eu. The energy shift is mainly due to Fermi-energy changes as confirmed by work-function measurements of the samples. The resultant shift is discussed in terms of charge transfer together with existing Moessbauer-isomer-shift data.},
doi = {10.1103/PhysRevB.20.4416},
url = {https://www.osti.gov/biblio/5775319}, journal = {Phys. Rev., B: Condens. Matter; (United States)},
number = ,
volume = 20:11,
place = {United States},
year = {1979},
month = {12}
}