Fluorescence extended X-ray absorption fine structure analysis of half-metallic ferromagnet "zinc-blende CrAs" grown on GaAs by molecular beam epitaxy

H. Ofuchi, M. Mizuguchi, K. Ono, M. Oshima, H. Akinaga, T. Manago

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In this work, geometric structures for a half-metallic ferromagnet "zinc-blende CrAs", which showed ferromagnetic behavior beyond room temperature, were investigated using fluorescence extended X-ray absorption fine structure (EXAFS) measurement. The EXAFS measurements revealed that As atoms around Cr atoms in the 2 nm CrAs film grown on a GaAs(001) substrate were coordinated tetrahedrally, indicating formation of zinc-blende CrAs. The Cr-As bond length in the zinc-blende CrAs is 2.49 Å. This value is close to that which was estimated from the lattice constant (5.82 Å) of ferromagnetic zinc-blende CrAs calculated by full-potential linearized augmented-plane wave method. The EXAFS analysis show that the theoretically predicted zinc-blende CrAs can be fabricated on GaAs(001) substrate by low-temperature molecular-beam epitaxy.

Original languageEnglish
Pages (from-to)227-230
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume199
DOIs
Publication statusPublished - 2003 Jan 1
Externally publishedYes

Keywords

  • Arsenic compounds
  • Chromium compounds
  • EXAFS
  • Half-metallic ferromagnet
  • X-ray fluorescence analysis

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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