Meny

Javascript is not activated in your browser. This website needs javascript activated to work properly.
Du är här

Structural and magnetic properties of nanoclusters in GaMnAs granular layers

Författare:
  • K. Lawniczak-Jablonska
  • J. Bak-Misiuk
  • E. Dynowska
  • P. Romanowski
  • J. Z. Domagala
  • J. Libera
  • A. Wolska
  • M. T. Klepka
  • P. Dluzewski
  • Janusz Sadowski (Dr)
  • A. Barcz
  • D. Wasik
  • A. Twardowski
  • A. Kwiatkowski
Publiceringsår: 2011
Språk: Engelska
Sidor: 1530-1539
Publikation/Tidskrift/Serie: Journal of Solid State Chemistry
Volym: 184
Nummer: 6
Dokumenttyp: Artikel
Förlag: Academic Press Inc Elsevier Science

Sammanfattning

Structural and magnetic properties of GaAs thin films with embedded nanoclusters were investigated as a function of the annealing temperature and Mn content. Surprisingly, the presence of two kinds of nanoclusters with different structure was detected in most of the samples independently of the thermal processing or Mn content. This proved that the presence of a given type of clusters cannot be assumed a priori as is reported in many papers. The fraction of Mn atoms in each kind of cluster was estimated from the extended X-ray absorption fine structure analysis. This analysis ruled out the possibility of the existence of nanoclusters containing a hypothetic MnAs cubic compound-only (Ga,Mn)As cubic and hexagonal MnAs clusters were detected. Moreover the bimodal distribution of Mn magnetic moments was found, which scales with the estimated fraction of Mn atoms in the cubic and hexagonal clusters. (C) 2011 Elsevier Inc. All rights reserved.

Disputation

Nyckelord

  • Chemistry
  • GaMnAs
  • Semiconductors
  • Nanoclusters
  • Spintronics
  • Ferromagnetism

Övriga

Published
Yes
  • ISSN: 0022-4596

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen