Density dependence of zinc-blende MnAs dots studied by X-ray absorption spectroscopy and X-ray magnetic circular dichroism

J. Okabayashi, M. Mizuguchi, K. Ono, M. Oshima, A. Fujimori, M. Yuri, C. T. Chen, H. Akinaga

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Zinc-blende type nanoscale MnAs dots were grown on a sulfur-passivated GaAs (001) surface by molecular beam epitaxy. We report on the dot density dependence of the X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) in the Mn 2p core-level region. The XAS spectrum of low-density MnAs dots showed "localized" behavior as in the case of (Ga,Mn)As, while the spectrum of high-density MnAs dots changed to metallic behavior. The magnetic-field dependence of the XMCD revealed ferromagnetic behavior in the case of high-density MnAs dots.

Original languageEnglish
Pages (from-to)e1553-e1555
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2004 May 1
Externally publishedYes

Keywords

  • X-ray absorption spectroscopy
  • X-ray magnetic circular dichroism
  • Zinc-blende MnAs dots

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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