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A misfit structure in the Co/Pt(111) system studied by scanning tunnelling microscopy and embedded atom method calculations

Lundgren, Edvin LU ; Leonardelli, G; Schmid, M and Varga, P (2002) In Surface Science 498(3). p.257-265
Abstract
We have performed scanning tunnelling microscopy (STM) measurements of thin films of Co and CoPt alloys on Pt(111). In contrast to the interpretation of an earlier low energy electron diffraction investigation by Tsay and Shern [Surf. Sci. 396 (1998) 313] we find that the structure observed upon annealing a Pt(111) sample with a 2 ML (monolayer, ML) thick film of Co does not consist of a rotated Co film but rather of a CoPt alloy film with hexagonal areas of fee stacking, single and double stacking faults, delimited by misfit dislocations (Shockley partial dislocations). Comparison of STM images with embedded atom method calculations confirms our model. The structure at the Pt-PtCo interface in our model is similar to that proposed by... (More)
We have performed scanning tunnelling microscopy (STM) measurements of thin films of Co and CoPt alloys on Pt(111). In contrast to the interpretation of an earlier low energy electron diffraction investigation by Tsay and Shern [Surf. Sci. 396 (1998) 313] we find that the structure observed upon annealing a Pt(111) sample with a 2 ML (monolayer, ML) thick film of Co does not consist of a rotated Co film but rather of a CoPt alloy film with hexagonal areas of fee stacking, single and double stacking faults, delimited by misfit dislocations (Shockley partial dislocations). Comparison of STM images with embedded atom method calculations confirms our model. The structure at the Pt-PtCo interface in our model is similar to that proposed by Henzler [Surf. Sci. 419 (1999) 321]. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
semi-empirical models and model calculations, scanning tunneling microscopy, cobalt, platinum, growth, epitaxy, metal-metal magnetic thin, film structures, low energy electron diffraction (LEED)
in
Surface Science
volume
498
issue
3
pages
257 - 265
publisher
Elsevier
external identifiers
  • wos:000174044700007
  • scopus:0037138497
ISSN
0039-6028
DOI
10.1016/S0039-6028(01)01754-X
language
English
LU publication?
yes
id
3dd42ccf-c0fd-4889-942c-85d30e941c81 (old id 342709)
date added to LUP
2007-11-16 15:07:31
date last changed
2017-01-01 06:41:25
@article{3dd42ccf-c0fd-4889-942c-85d30e941c81,
  abstract     = {We have performed scanning tunnelling microscopy (STM) measurements of thin films of Co and CoPt alloys on Pt(111). In contrast to the interpretation of an earlier low energy electron diffraction investigation by Tsay and Shern [Surf. Sci. 396 (1998) 313] we find that the structure observed upon annealing a Pt(111) sample with a 2 ML (monolayer, ML) thick film of Co does not consist of a rotated Co film but rather of a CoPt alloy film with hexagonal areas of fee stacking, single and double stacking faults, delimited by misfit dislocations (Shockley partial dislocations). Comparison of STM images with embedded atom method calculations confirms our model. The structure at the Pt-PtCo interface in our model is similar to that proposed by Henzler [Surf. Sci. 419 (1999) 321].},
  author       = {Lundgren, Edvin and Leonardelli, G and Schmid, M and Varga, P},
  issn         = {0039-6028},
  keyword      = {semi-empirical models and model calculations,scanning tunneling microscopy,cobalt,platinum,growth,epitaxy,metal-metal magnetic thin,film structures,low energy electron diffraction (LEED)},
  language     = {eng},
  number       = {3},
  pages        = {257--265},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {A misfit structure in the Co/Pt(111) system studied by scanning tunnelling microscopy and embedded atom method calculations},
  url          = {http://dx.doi.org/10.1016/S0039-6028(01)01754-X},
  volume       = {498},
  year         = {2002},
}