Surfactant effect and dissolution of ultrathin Fe films on Ag(001)

S. Terreni, A. Cossaro, G. Gonella, L. Mattera, L. Duò, F. Ciccacci, D. Cvetko, L. Floreano, A. Morgante, A. Verdini, and M. Canepa
Phys. Rev. B 70, 115420 – Published 29 September 2004

Abstract

The effects of annealing on the structure of ultra thin Fe films (410ML) deposited at 150K on Ag(001) were studied by synchrotron radiation photoelectron diffraction (PED) and x-ray diffraction (XRD). The occurrence of a surfactant-like stage, in which a single layer of Ag covers the Fe film is demonstrated for films of 46ML heated at 500550K. Evidence of a stage characterized by the formation of two Ag capping layers is also reported. As the annealing temperature was increased beyond 700K the surface layers closely resembled the structure of bare Ag(001) with the residual presence of subsurface Fe aggregates. The data illustrate a film dissolution path which is in agreement with recent theoretical models [J. Roussel et al. Phys. Rev. B 60, 13890 (1999)].

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  • Received 31 December 2003

DOI:https://doi.org/10.1103/PhysRevB.70.115420

©2004 American Physical Society

Authors & Affiliations

S. Terreni1, A. Cossaro2, G. Gonella1, L. Mattera1, L. Duò3, F. Ciccacci3, D. Cvetko2,*, L. Floreano2, A. Morgante2,†, A. Verdini2, and M. Canepa1,‡

  • 1Unità INFM and CNR-IMEM, Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146 Genova, Italy
  • 2Laboratorio TASC-INFM, Trieste, Italy
  • 3INFM and Dipartimento di Fisica, Politecnico di Milano, Italy

  • *Also at the Department of Physics, University of Ljubljana, Slovenia.
  • Also at the Department of Physics, University of Trieste, Italy.
  • Electronic address: Canepa@fisica.unige.it

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Issue

Vol. 70, Iss. 11 — 15 September 2004

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