Affordable Access

Publisher Website

Chemical substitution effect on Yb valence in the surface region ofYb1− xMxAl2(=Sc,Ca): A photoemission investigation

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
79
Issue
1
Identifiers
DOI: 10.1016/0038-1098(91)90482-b
Disciplines
  • Chemistry

Abstract

Abstract Photoemission spectra of pseudobinary Yb 1− x M x Al 2 ( M = Sc, Ca) compounds derived from YbAl 2 are given ( hν = 40.8, 65, 181.5 and 1253.6 eV) at various stoichiometries corresponding to compressed (with Sc) and decompressed compounds (with Ca). The surface divalent Yb 4 f signal depends on the chemical substitution and is stronger in the compressed compounds (2.9 times with respect to YbAl 2 in the case of 80% Sc measured at 40.8 eV). Auger results are also reported. The effect is discussed in connection with the release of compression energy in the surface region.

There are no comments yet on this publication. Be the first to share your thoughts.