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

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Abstract

Self-organized (Ga,Mn)As nanoclusters, embedded in GaAs and formed during thermal annealing of Ga1-xMnxAs layer at 500 °C or 600 °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.

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Acknowledgments

The use of TEM facilities at the Faculty of Materials Science and Engineering of Warsaw University of Technology is kindly appreciated. This work was partially supported by the Polish Ministry of Science and High Education by Grant No. N202 052 32/1189.

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Authors and Affiliations

  1. Institute of Experimental Physics, Warsaw University, Hoża 69, Warsaw, 00-681, Poland

    Adam Kwiatkowski, Dariusz Wasik, Maria Kamińska, Rafal Bożek & Andrzej Twardowski

  2. Institute of Electronic Materials Technology, Wólczyńska 133, Warsaw, 01-919, Poland

    Jolanta Borysiuk

  3. Institute of Physics, PAS, Al. Lotników 32/46, Warsaw, 02-668, Poland

    Janusz Sadowski

  4. MAX-Lab, Lund University, Lund, 221 00, Sweden

    Janusz Sadowski

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  1. Adam Kwiatkowski
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  2. Dariusz Wasik
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  5. Rafal Bożek
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Correspondence to Dariusz Wasik.

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Kwiatkowski, A., Wasik, D., Kamińska, M. et al. Structural and magnetic properties of MnAs/GaAs ferromagnetic semiconductor nanocomposite material. J Mater Sci: Mater Electron 19, 740–743 (2008). https://doi.org/10.1007/s10854-007-9400-8

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  • DOI: https://doi.org/10.1007/s10854-007-9400-8

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