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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
; ; ; and
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
2016-04-01 10:07:04
date last changed
2022-01-25 19:57:14
@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}},
  keywords     = {{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}},
  doi          = {{10.1007/s12274-011-0153-6}},
  volume       = {{4}},
  year         = {{2011}},
}