Asymmetric interfaces in Fe/Ag and Ag/Fe bilayers prepared by molecular beam evaporation

A. Tunyogi, F. Pászti, Z. Osváth, F. Tanczikó, M. Major, E. Szilágyi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Single layers of Fe and Ag, as well as Fe/Ag (iron deposited first) and Ag/Fe bilayers were prepared by molecular beam evaporation onto Si. The samples were investigated with backscattering spectrometry (BS) and atomic force microscopy (AFM). BS spectra of Fe/Ag and Ag/Fe indicate a significant difference at the interface. In the case of Fe/Ag the Ag peak has a long tail at the interface, while for Ag/Fe the interface is abrupt. The tail in the Fe/Ag spectrum is too large to be caused by double or plural scattering. According to AFM, the effect of surface roughness is also negligible. In spite of the fact that Fe and Ag are completely immiscible in equilibrium, this tail, however, suggests that some Ag is located in the Fe layer. After annealing, both samples show mixing between the two layers; this is much larger again for Fe/Ag.

Original languageEnglish
Pages (from-to)384-386
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume249
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - Aug 1 2006

Keywords

  • Atomic force microscopy
  • Backscattering spectrometry
  • Fe/Ag system
  • Interface
  • Molecular beam evaporation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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