Quantitative compositional analyses of ordered Pt3Co by atom-probe field-ion microscopy

Masahiko Yamamoto*, David N. Seidman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Atom-probe field-ion microscope analyses were performed on specimens of fully ordered Pt3Co. The purpose of the investigation was to study the effects of different important experimental parameters on the composition measured by the atom-probe technique. The dependence of the alloy's composition on the following parameters was determined: (1) pulse fraction; (2) specimen temperature; (3) crystal plane; and (4) field-evaporation rate. It was demonstrated that the composition determined by atom-probe analyses of Pt3Co is very sensitive to the above four parameters. The effects of the different experiment parameters on the measured Pt and Co concentrations are discussed in terms of possible field-evaporation mechanisms. A set of optimum experimental conditions to obtain quantitative chemical information is presented.

Original languageEnglish (US)
Pages (from-to)535-554
Number of pages20
JournalSurface Science
Volume118
Issue number3
DOIs
StatePublished - Jun 2 1982

ASJC Scopus subject areas

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

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