Impurity stabilized near-surface phase on ion bombarded α-Fe 2O3(0 0 0 1)

Ann N. Chiaramonti, Peter C. Stair, Laurence D. Marks

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Following Ar+ ion bombardment, an epitaxial spinel phase forms on the near-surface of hematite specimens that contain impurity species. This near-surface spinel phase can readily be distinguished in a transmission electron diffraction pattern, and is stable under a much broader range of oxygen partial pressures than has been previously observed in the literature. Conversely, hematite samples which are impurity free show no evidence of an epitaxial spinel phase. Regardless of the impurity concentration, samples annealed at high temperature in oxygen-rich environments show (1 × 1) diffraction patterns indicative of a bulk hematite termination.

Original languageEnglish
Pages (from-to)38-44
Number of pages7
JournalSurface Science
Volume586
Issue number1-3
DOIs
Publication statusPublished - Jul 20 2005

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Keywords

  • Ion response bombardment
  • Iron oxide
  • Single crystal surfaces
  • Surface structure and morphology
  • Transmission high energy electron diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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