Voids and Mn-rich inclusions in a (Ga,Mn)As ferromagnetic semiconductor investigated by transmission electron microscopy
Author
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.
Department/s
Publishing year
2011
Language
English
Pages
1-083546
Publication/Series
Applied Physics Reviews
Volume
109
Issue
8
Full text
Document type
Journal article
Publisher
American Institute of Physics (AIP)
Topic
- Physical Sciences
- Natural Sciences
Keywords
- molecular beam epitaxial growth
- transmission electron microscopy
- nanostructured materials
- magnetic semiconductors
Status
Published
ISBN/ISSN/Other
- ISSN: 1931-9401