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Self-assembly of Fe nanocluster arrays on templated surfaces

Lubben, Olaf; Krasnikov, Sergey A.; Preobrajenski, Alexei LU ; Murphy, Barry E.; Bozhko, Sergey I.; Arora, Sunil K. and Shvets, Igor V. (2012) In Applied Physics Reviews 111(7).
Abstract
The growth of Fe nanoclusters on the Ge(001) and MoO2/Mo(110) surfaces has been studied using low-temperature scanning tunneling microscopy (STM) and X-ray magnetic circular dichroism (XMCD). STM results indicate that at low coverage Fe atoms self-assemble on both surfaces into well-separated nanoclusters, which nucleate at equivalent surface sites. Their size, shape, and the observed spatial separation are dictated by the substrate and depend on preparation conditions. Annealing the Fe nanoclusters on Ge(001) at 420 K leads to the formation of linear nanocluster arrays, which follow the Ge dimer rows of the substrate, due to cluster mobility at such temperature. In turn, linear Fe nanocluster arrays are formed on the MoO2/Mo(110) surface... (More)
The growth of Fe nanoclusters on the Ge(001) and MoO2/Mo(110) surfaces has been studied using low-temperature scanning tunneling microscopy (STM) and X-ray magnetic circular dichroism (XMCD). STM results indicate that at low coverage Fe atoms self-assemble on both surfaces into well-separated nanoclusters, which nucleate at equivalent surface sites. Their size, shape, and the observed spatial separation are dictated by the substrate and depend on preparation conditions. Annealing the Fe nanoclusters on Ge(001) at 420 K leads to the formation of linear nanocluster arrays, which follow the Ge dimer rows of the substrate, due to cluster mobility at such temperature. In turn, linear Fe nanocluster arrays are formed on the MoO2/Mo(110) surface at room temperature at a surface coverage greater than 0.5 monolayer. This is due to the more pronounced row pattern of the MoO2/Mo(110) surface compared to Ge(001). These nanocluster arrays follow the direction of the oxide rows of the strained MoO2/Mo(110) surface. The Fe nanoclusters formed on both surfaces show a superparamagnetic behavior as measured by XMCD. (C) 2012 American Institute of Physics. [doi:10.1063/1.3676207] (Less)
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publication status
published
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in
Applied Physics Reviews
volume
111
issue
7
publisher
American Institute of Physics
external identifiers
  • wos:000303282400212
  • scopus:84861742538
ISSN
0021-8979
DOI
10.1063/1.3676207
language
English
LU publication?
yes
id
e23ec643-7e4d-486e-9a35-27d6f5d422cb (old id 2819416)
date added to LUP
2012-06-21 13:51:37
date last changed
2017-05-28 03:23:05
@article{e23ec643-7e4d-486e-9a35-27d6f5d422cb,
  abstract     = {The growth of Fe nanoclusters on the Ge(001) and MoO2/Mo(110) surfaces has been studied using low-temperature scanning tunneling microscopy (STM) and X-ray magnetic circular dichroism (XMCD). STM results indicate that at low coverage Fe atoms self-assemble on both surfaces into well-separated nanoclusters, which nucleate at equivalent surface sites. Their size, shape, and the observed spatial separation are dictated by the substrate and depend on preparation conditions. Annealing the Fe nanoclusters on Ge(001) at 420 K leads to the formation of linear nanocluster arrays, which follow the Ge dimer rows of the substrate, due to cluster mobility at such temperature. In turn, linear Fe nanocluster arrays are formed on the MoO2/Mo(110) surface at room temperature at a surface coverage greater than 0.5 monolayer. This is due to the more pronounced row pattern of the MoO2/Mo(110) surface compared to Ge(001). These nanocluster arrays follow the direction of the oxide rows of the strained MoO2/Mo(110) surface. The Fe nanoclusters formed on both surfaces show a superparamagnetic behavior as measured by XMCD. (C) 2012 American Institute of Physics. [doi:10.1063/1.3676207]},
  author       = {Lubben, Olaf and Krasnikov, Sergey A. and Preobrajenski, Alexei and Murphy, Barry E. and Bozhko, Sergey I. and Arora, Sunil K. and Shvets, Igor V.},
  issn         = {0021-8979},
  language     = {eng},
  number       = {7},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Reviews},
  title        = {Self-assembly of Fe nanocluster arrays on templated surfaces},
  url          = {http://dx.doi.org/10.1063/1.3676207},
  volume       = {111},
  year         = {2012},
}