Interpretation of MVV and L/sub 2,3/ VV Auger spectra of Co

Journal Article · Mon Mar 01 04:00:00 EST 1982 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.571504· OSTI ID:5585331

Zehner, D M; Noonan, J R; Madden, H H

The MVV and L/sub 2,3/ VV Auger spectra of Co have been acquired from a clean polycrystalline foil and the intrinsic line shapes determined using standard deconvolution procedures. The line shapes are observed to be broad and band-like and do not exhibit any narrow atomic-like features as previously observed for Cu. The energies of the peak positions of the Co Auger lines might be interpreted as indicating hole--hole interaction energies (U/sub eff/ ) of approx.4.5 eV for the MVV and approx.2 eV for the L/sub 2,3/ VV transitions, respectively. These values are inconsistent with the expected trend of decreasing U/sub eff/ in going from Cu to Co and with the fact that U/sub eff/ , a final state property, should be the same for all core--valence--valence decays. An alternative explanation is that the energy shifts are related to initial state screening and/or matrix element effects. These effects, as well as the differing lifetimes of each initial core hole, may also contribute to the larger FWHM of the measured spectra as compared to that obtained by self-folding a calculated DOS. The interpretation of these spectra and a comparison with similar data for Cu are discussed.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• DOE Contract Number: W-7405-ENG-26; AC04-76DP00789
• OSTI ID: 5585331
• Journal Information: J. Vac. Sci. Technol.; (United States), Journal Name: J. Vac. Sci. Technol.; (United States) Vol. 20:3; ISSN JVSTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
AUGER ELECTRON SPECTROSCOPY
BAND THEORY
COBALT
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL DENSITY
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
HOLES
LINE NARROWING
LINE WIDTHS
METALS
SPECTRAL SHIFT
SPECTROSCOPY
TRANSITION ELEMENTS
VALENCE