Voids and Mn-rich inclusions in a (Ga,Mn)As ferromagnetic semiconductor investigated by transmission electron microscopy
Författare
Summary, in English
Voids adjacent to cubic (ZnS-type) and hexagonal (NiAs-type) Mn-rich nanocrystals are characterized using aberration-corrected transmission electron microscopy in an annealed Ga(0.995)Mn(0.005)As magnetic semiconductor specimen grown by molecular beam epitaxy. Nanobeam electron diffraction measurements suggest that the nanocrystals exhibit deviations in lattice parameter as compared to bulk MnAs. After annealing at 903 K, the magnetic transition temperature of the specimen is likely to be dominated by the presence of cubic ferromagnetic nanocrystals. In situ annealing inside the electron microscope is used to study the nucleation, coalescence, and grain growth of individual nanocrystals.
Avdelning/ar
Publiceringsår
2011
Språk
Engelska
Sidor
1-083546
Publikation/Tidskrift/Serie
Applied Physics Reviews
Volym
109
Issue
8
Fulltext
Dokumenttyp
Artikel i tidskrift
Förlag
American Institute of Physics (AIP)
Ämne
- Physical Sciences
- Natural Sciences
Nyckelord
- molecular beam epitaxial growth
- transmission electron microscopy
- nanostructured materials
- magnetic semiconductors
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1931-9401