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Anders Mikkelsen. Portrait.

Anders Mikkelsen

Professor

Anders Mikkelsen. Portrait.

Co on Mo(110) studied by scanning tunneling microscopy

Author

  • Anders Mikkelsen
  • Lassana Ouattara
  • Edvin Lundgren

Summary, in English

We have studied the interface formation of thin films of Co on a Mo(1 1 0) surface by the use of scanning tunneling microscopy (STM), low energy electron diffraction (LEED) and auger electron spectroscopy (AES). Below a coverage of about 0.4 monolayers (ML) we find that Co grows in small islands which are pesudomorphic with the Mo substrate. At a Cc coverage above 0.4 ML, the Co atoms condense into larger islands and forms a close-packed Co layer close to that of the Co(0 0 0 1) plane resulting in a coincidence structure with the underlying Mo(1 1 0) substrate. Increasing the Co coverage. we observe that the film grows in a layer-by-layer fashion up to 2 ML at room temperature, however by annealing such a film to 670 K the Co forms 3D islands. STM images displaying atomic resolution, reveal the atomic arrangement and corrugation of the close-packed Co film formed at Co coverages above 0.4 ML at room temperature. In particular, the STM data directly demonstrate the appearance of the coincidence lattice between the Nishiyama-Wasserman orientated Co film and the Mo(1 1 0) substrate. We show how this appearance may change due to subtle changes of the registry between the Co film and the Mo(1 1 0) surface. This behavior can be explained by partial dislocations relaxing the strained close-packed Co layer by a small rigid translation. (C) 2004 Elsevier B.V. All rights reserved.

Department/s

  • Synchrotron Radiation Research

Publishing year

2004

Language

English

Pages

109-118

Publication/Series

Surface Science

Volume

557

Issue

1-3

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • molybdenum
  • cobalt
  • Auger electron spectroscopy
  • scanning tunneling microscopy
  • low energy electron diffraction (LEED)

Status

Published

ISBN/ISSN/Other

  • ISSN: 0039-6028