Nondestructive spectroscopic method to detect MnAs metallic nanocrystals in annealed GaAs:Mn

S. S.A. Seo, T. W. Noh, Y. W. Kim, J. D. Lim, Y. D. Park, Y. S. Kim, Z. G. Khim, H. C. Jeon, T. W. Kang, S. J. Pearton

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


An optical spectroscopic method, to monitor NiAs-type MnAs (α-MnAs) nanocrystals in (Ga, Mn)As diluted magnetic semiconductors, was presented. Mn ion implantation of low temperature (LT) GaAs epitaxial thin films followed by rapid thermal annealing (RTA) was utilized to yield embedded ferromagnetic α-MnAs nanoclusters in a GaAs:Mn matrix. It was observed that in optical spectra, the annealed samples showed resonant absorption at 0.9 eV photon energy, which was due to resonant surface plasma oscillation of spherical metallic phases embedded in LT GaAs. The metallic clusters in LT GaAs were identified as α-MnAs nanocrystals by comparing them with Maxwell-Garnett theory based simulations.

Original languageEnglish
Pages (from-to)8172-8177
Number of pages6
JournalJournal of Applied Physics
Issue number12
StatePublished - Jun 15 2004

ASJC Scopus subject areas

  • General Physics and Astronomy


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