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Fe Nanoclusters on the Ge(001) Surface Studied by Scanning Tunneling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism

Luebben, Olaf; Krasnikov, Sergey A.; Preobrajenski, Alexei LU ; Murphy, Barry E. and Shvets, Igor V. (2011) In Nano Reseach 4(10). p.971-978
Abstract
The growth of Fe nanoclusters on the Ge(001) surface has been studied using low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. STM results indicate that Fe nucleates on the Ge(001) surface, forming well-ordered nanoclusters of uniform size. Depending on the preparation conditions, two types of nanoclusters were observed having either four or sixteen Fe atoms within a nanocluster. The results were confirmed by DFT calculations. Annealing the nanoclusters at 420 K leads to the formation of nanorow structures, due to cluster mobility at such temperature. The Fe nanoclusters and nanorow structures formed on the Ge(001) surface show a superparamagnetic behaviour as measured by X-ray magnetic... (More)
The growth of Fe nanoclusters on the Ge(001) surface has been studied using low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. STM results indicate that Fe nucleates on the Ge(001) surface, forming well-ordered nanoclusters of uniform size. Depending on the preparation conditions, two types of nanoclusters were observed having either four or sixteen Fe atoms within a nanocluster. The results were confirmed by DFT calculations. Annealing the nanoclusters at 420 K leads to the formation of nanorow structures, due to cluster mobility at such temperature. The Fe nanoclusters and nanorow structures formed on the Ge(001) surface show a superparamagnetic behaviour as measured by X-ray magnetic circular dichroism. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ge(001), iron nanoclusters, self-assembly, scanning tunnelling, microscopy, X-ray magnetic circular dichroism, density functional, theory calculations
in
Nano Reseach
volume
4
issue
10
pages
971 - 978
publisher
Springer
external identifiers
  • wos:000296649100006
  • scopus:80053442309
ISSN
1998-0124
DOI
10.1007/s12274-011-0153-6
language
English
LU publication?
yes
id
4b37c648-1675-4069-920b-94d01a84b9c5 (old id 2253150)
date added to LUP
2011-12-21 15:27:07
date last changed
2017-01-01 03:17:39
@article{4b37c648-1675-4069-920b-94d01a84b9c5,
  abstract     = {The growth of Fe nanoclusters on the Ge(001) surface has been studied using low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. STM results indicate that Fe nucleates on the Ge(001) surface, forming well-ordered nanoclusters of uniform size. Depending on the preparation conditions, two types of nanoclusters were observed having either four or sixteen Fe atoms within a nanocluster. The results were confirmed by DFT calculations. Annealing the nanoclusters at 420 K leads to the formation of nanorow structures, due to cluster mobility at such temperature. The Fe nanoclusters and nanorow structures formed on the Ge(001) surface show a superparamagnetic behaviour as measured by X-ray magnetic circular dichroism.},
  author       = {Luebben, Olaf and Krasnikov, Sergey A. and Preobrajenski, Alexei and Murphy, Barry E. and Shvets, Igor V.},
  issn         = {1998-0124},
  keyword      = {Ge(001),iron nanoclusters,self-assembly,scanning tunnelling,microscopy,X-ray magnetic circular dichroism,density functional,theory calculations},
  language     = {eng},
  number       = {10},
  pages        = {971--978},
  publisher    = {Springer},
  series       = {Nano Reseach},
  title        = {Fe Nanoclusters on the Ge(001) Surface Studied by Scanning Tunneling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism},
  url          = {http://dx.doi.org/10.1007/s12274-011-0153-6},
  volume       = {4},
  year         = {2011},
}