ACTA

MnAs Nanocrystals Embedded in GaAs

A. Kwiatkowski^a, J. Borysiuk^{a, b}, R. Bożek^a, D. Wasik^a, M. Kamińska^a, J. Sadowski^c and A. Twardowski^a
^aInstitute of Experimental Physics, Warsaw University Hoża 69, 00-681 Warsaw, Poland
^bInstitute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland
^cInstitute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

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Received: 17 06 2006;

We report on cross-sectional transmission electron microscopy and magnetic force microscopy studies performed on self-organized MnAs nanoclusters embedded in GaAs. It was found that 10÷20 nm large MnAs ferromagnetic nanocrystals were formed during rapid thermal annealing of Ga_1-xMn_nAs layers at 600ºC, leading to magnetic contrasts in magnetic force microscopy images.

DOI: 10.12693/APhysPolA.110.233
PACS numbers: 61.46.+w, 61.82.Fk, 68.37.Rt, 68.37.Lp, 74.25.Ha