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1.
  • Mathieu, R, et al. (author)
  • Magnetization of ultrathin (Ga,Mn)As layers
  • 2003
  • In: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 68:18: 184421
  • Journal article (peer-reviewed)abstract
    • Kerr rotation and superconducting quantum interference device magnetometry measurements were performed on ultrathin (Ga0.95Mn0.05)As layers. The thinner layers (below 250 A) exhibit magnetic properties different than those of thicker ones, associated with different microstructure, and some degree of inhomogeneity. The temperature dependence of the field-cooled magnetization of the layers is recorded after successive low temperature annealings. While the Curie temperature of the thicker layer (250 A) is nearly unchanged, the critical temperature of the thinner layers is enhanced by more than 23 K after two annealings. Secondary ion mass spectrometry experiments on similar layers show that Mn is displaced upon annealing. The results are discussed considering a possible segregation of substitutional and interstitial Mn atoms at the surface of the (Ga,Mn)As layers.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Sadowski, Janusz (1)
Svedlindh, P (1)
Kanski, J (1)
Mathieu, R (1)
Sorensen, BS (1)
Lindelof, PE (1)
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Sodervall, U. (1)
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University
Lund University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2003 (1)

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