Elsevier

Surface Science

Volume 264, Issue 3, 15 March 1992, Pages 429-434
Surface Science

Electron spectroscopy study of the oxidation of a ZrFe getter: II. Valence states

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Abstract

The valence electron states of a ZrFe getter having Zr2Fe as majority component (80% of the total volume) and their evolution upon oxidation at room temperature are studied with direct photoemission (hv = 21.2 and 40.8 eV) and inverse photoemission (isochromats in the range 12–21 eV). In the clean getter direct photoemission is mostly sensitive to Fe-derived states and inverse photoemission to Zr-derived states. Direct photoemission shows the modification of oxygen-p-derived states in the suboxide-oxide transition and the effect of Fe-oxygen interaction with a depletion of Fe d states near the Fermi level. Inverse photoemission shows a progressive localization of the Zr d states upon oxidation.

References (20)

  • P. Oelhafen et al.

    Solid State Commun.

    (1980)
  • J.J. Yeh et al.

    At. Data Nucl. Data Tables

    (1985)
  • M. Morinaga et al.

    J. Phys. Chem. Solids

    (1983)
    F. Zandiehnadem et al.

    Physica B

    (1988)
  • G.R. Corallo et al.

    Phys. Rev. B

    (1987)
  • A. Fujimori et al.

    Phys. Rev. B

    (1986)
    A. Fujimori et al.

    Phys. Rev. B

    (1987)
  • M. Sancrotti et al.

    Rev. Sci. Instrum.

    (1991)
  • D.E. Eastman et al.

    Phys. Rev. Lett.

    (1970)
  • V.L. Moruzzi et al.

    Phys. Rev. B

    (1983)
  • H. Neddermayer et al.

    Phys. Rev. B

    (1987)
  • I. Abbati et al.

    Phys. Rev. Lett.

    (1983)
There are more references available in the full text version of this article.

Cited by (9)

  • Oxidation mechanism of porous Zr<inf>2</inf>Fe used as a hydrogen getter

    2016, Applied Radiation and Isotopes
    Citation Excerpt :

    Understanding the kinetic aging mechanism (oxidation) of this NEG is of major importance for the optimal design, operational parameters, and life-cycle performance estimation of getter devices (Birtill, 2003; Rodrigo and Sawicki, 1999; Venkataramani et al., 1993; Yamanaka et al., 1991). However, research on the interaction of Zr2Fe with oxygen is still in the initial stage (Nano-scale), and has only been performed using surface-sensitive techniques (Bastianon et al., 1992; Puppin et al., 1992; Zalkind et al., 2010). In the present study, therefore, we carried out thermogravimetric solid-state kinetic analysis on porous Zr2Fe samples exposed to low concentrations of oxygen.

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