Physics – Condensed Matter – Materials Science
Scientific paper
2002-07-09
Acta Phys. Pol. A 102, 687 (2002)
Physics
Condensed Matter
Materials Science
Proceedings of the XXXI International School on the Physics of Semiconducting Compounds, Jaszowiec, Poland, June 7-14 (2002)
Scientific paper
We have observed a paramagnetic-to-ferromagnetic phase transition in short period InGaMnAs/InGaAs superlattices. The thicknesses of magnetic InGaMnAs layers in the structures studied was chosen to be 4 or 8 molecular layers (12 \AA or 24 \AA). The nonmagnetic InGaAs spacer layers are 12 \AA thick. The In content of InGaMnAs and InGaAs layers was chosen in such a way that magnetic layers were: deep potential wells, high potential barriers or shallow potential wells. For superlattices with 8 monolayer thick InGaMnAs magnetic layers and 4 monolayer thick InGaAs nonmagnetic spacers the temperatures of paramagnetic-to-ferromagnetic phase transition do not depend on the band offsets between InGaMnAs and InGaAs adjusted by the In content.
Domagala Jarek Z.
Kanski Janusz
Karlsteen M.
Mathieu Renaud
Sadowski Janusz
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