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Co on Mo(110) studied by scanning tunneling microscopy

Mikkelsen, Anders LU ; Ouattara, Lassana LU and Lundgren, Edvin LU (2004) In Surface Science 557(1-3). p.109-118
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
molybdenum, cobalt, Auger electron spectroscopy, scanning tunneling microscopy, low energy electron diffraction (LEED)
in
Surface Science
volume
557
issue
1-3
pages
109 - 118
publisher
Elsevier
external identifiers
  • wos:000221511700015
  • scopus:2342570926
ISSN
0039-6028
DOI
10.1016/j.susc.2004.03.020
language
English
LU publication?
yes
id
9ca4ff6c-9293-4d92-9c46-9fc695b3b8f5 (old id 277155)
date added to LUP
2007-10-28 15:08:14
date last changed
2017-05-28 04:20:10
@article{9ca4ff6c-9293-4d92-9c46-9fc695b3b8f5,
  abstract     = {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.},
  author       = {Mikkelsen, Anders and Ouattara, Lassana and Lundgren, Edvin},
  issn         = {0039-6028},
  keyword      = {molybdenum,cobalt,Auger electron spectroscopy,scanning tunneling microscopy,low energy electron diffraction (LEED)},
  language     = {eng},
  number       = {1-3},
  pages        = {109--118},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Co on Mo(110) studied by scanning tunneling microscopy},
  url          = {http://dx.doi.org/10.1016/j.susc.2004.03.020},
  volume       = {557},
  year         = {2004},
}