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Structural and magnetic properties of MnAs/GaAs ferromagnetic semiconductor nanocomposite material

Författare:
  • Adam Kwiatkowski
  • Dariusz Wasik
  • Maria Kaminska
  • Jolanta Borysiuk
  • Rafal Bozek
  • Janusz Sadowski (Dr)
  • Andrzej Twardowski
Publiceringsår: 2008
Språk: Engelska
Sidor: 740-743
Publikation/Tidskrift/Serie: Journal of Materials Science: Materials in Electronics
Volym: 19
Nummer: 8-9
Dokumenttyp: Artikel
Förlag: Springer

Sammanfattning

Self-organized (Ga,Mn)As nanoclusters, embedded in GaAs and formed during thermal annealing of Ga1-xMnxAs layer at 500 degrees C or 600 degrees C, were studied using Transmission Electron Microscopy (TEM) and Magnetic Force Microscopy (MFM). We found that 10-20 nm large NiAs-type hexagonal MnAs nanocrystals gave magnetic contrast in MFM images, whereas smaller zinc-blende nanoinclusions were not visible by means of this technique. Theoretical simulations showed that MFM contrasts reflect interaction between magnetic tip and many randomly distributed MnAs nanocrystals.

Disputation

Nyckelord

  • Chemistry
  • Physics and Astronomy

Övrigt

Published
Yes
  • ISSN: 0957-4522

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