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Voids and Mn-rich inclusions in a (Ga,Mn)As ferromagnetic semiconductor investigated by transmission electron microscopy

Kovacs, A. ; Sadowski, Janusz LU ; Kasama, T. ; Domagala, J. ; Mathieu, R. ; Dietl, T. and Dunin-Borkowski, R. E. (2011) In Applied Physics Reviews 109(8). p.1-083546
Abstract
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.
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
molecular beam epitaxial growth, transmission electron microscopy, nanostructured materials, magnetic semiconductors
in
Applied Physics Reviews
volume
109
issue
8
pages
1 - 083546
publisher
American Institute of Physics (AIP)
external identifiers
  • wos:000290047000070
  • scopus:79955725295
ISSN
1931-9401
DOI
10.1063/1.3581108
language
English
LU publication?
yes
id
6f8e62fa-30c0-4912-8819-93c0aa2d05fd (old id 1940315)
date added to LUP
2016-04-01 11:10:46
date last changed
2021-08-25 05:21:23
@article{6f8e62fa-30c0-4912-8819-93c0aa2d05fd,
  abstract     = {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.},
  author       = {Kovacs, A. and Sadowski, Janusz and Kasama, T. and Domagala, J. and Mathieu, R. and Dietl, T. and Dunin-Borkowski, R. E.},
  issn         = {1931-9401},
  language     = {eng},
  number       = {8},
  pages        = {1--083546},
  publisher    = {American Institute of Physics (AIP)},
  series       = {Applied Physics Reviews},
  title        = {Voids and Mn-rich inclusions in a (Ga,Mn)As ferromagnetic semiconductor investigated by transmission electron microscopy},
  url          = {https://lup.lub.lu.se/search/files/2445527/1940325.pdf},
  doi          = {10.1063/1.3581108},
  volume       = {109},
  year         = {2011},
}