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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

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Author

Summary, in English

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.

Department/s

Publishing year

2011

Language

English

Pages

971-978

Publication/Series

Nano Reseach

Volume

4

Issue

10

Document type

Journal article

Publisher

Springer

Topic

  • Natural Sciences
  • Physical Sciences

Keywords

  • Ge(001)
  • iron nanoclusters
  • self-assembly
  • scanning tunnelling
  • microscopy
  • X-ray magnetic circular dichroism
  • density functional
  • theory calculations

Status

Published

ISBN/ISSN/Other

  • ISSN: 1998-0124