Structure and magnetism of MnAs nanocrystals embedded in GaAs as a function of post-growth annealing temperature
(2007) In Applied Physics Reviews 101(11).- Abstract
- Self-organized Ga(Mn)As nanoclusters, embedded in GaAs, were formed during post-growth thermal annealing of Ga1-xMnxAs layers. Structural and magnetic properties of such composites were systematically studied as a function of the annealing temperature. Small (similar to 3 nm) Mn-rich zinc-blende Mn(Ga)As clusters, coherent with the GaAs matrix, were formed at the annealing temperature of 500 degrees C. An increase of the annealing temperature of up to 600 degrees C led to the creation of 10-20 nm large NiAs-type hexagonal MnAs nanocrystals. Magnetization measurements showed that the MnAs nanoprecipitates were superparamagnetic, with a distribution of blocking temperatures that depended on the MnAs cluster size. Some intermediate... (More)
- Self-organized Ga(Mn)As nanoclusters, embedded in GaAs, were formed during post-growth thermal annealing of Ga1-xMnxAs layers. Structural and magnetic properties of such composites were systematically studied as a function of the annealing temperature. Small (similar to 3 nm) Mn-rich zinc-blende Mn(Ga)As clusters, coherent with the GaAs matrix, were formed at the annealing temperature of 500 degrees C. An increase of the annealing temperature of up to 600 degrees C led to the creation of 10-20 nm large NiAs-type hexagonal MnAs nanocrystals. Magnetization measurements showed that the MnAs nanoprecipitates were superparamagnetic, with a distribution of blocking temperatures that depended on the MnAs cluster size. Some intermediate paramagnetic clusters (structurally disordered clusters) were also observed. (c) 2007 American Institute of Physics. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/648412
- author
- Kwiatkowski, A. ; Wasik, D. ; Kaminska, M. ; Bozek, R. ; Szczytko, J. ; Twardowski, A. ; Borysiuk, J. ; Sadowski, Janusz LU and Gosk, J.
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Physics Reviews
- volume
- 101
- issue
- 11
- article number
- 113912
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000247306000097
- scopus:34250661900
- ISSN
- 1931-9401
- DOI
- 10.1063/1.2739215
- language
- English
- LU publication?
- yes
- id
- 46b4aa37-b43a-4be8-a8e8-480a07dd2b70 (old id 648412)
- date added to LUP
- 2016-04-01 12:04:24
- date last changed
- 2022-01-26 22:24:04
@article{46b4aa37-b43a-4be8-a8e8-480a07dd2b70,
abstract = {{Self-organized Ga(Mn)As nanoclusters, embedded in GaAs, were formed during post-growth thermal annealing of Ga1-xMnxAs layers. Structural and magnetic properties of such composites were systematically studied as a function of the annealing temperature. Small (similar to 3 nm) Mn-rich zinc-blende Mn(Ga)As clusters, coherent with the GaAs matrix, were formed at the annealing temperature of 500 degrees C. An increase of the annealing temperature of up to 600 degrees C led to the creation of 10-20 nm large NiAs-type hexagonal MnAs nanocrystals. Magnetization measurements showed that the MnAs nanoprecipitates were superparamagnetic, with a distribution of blocking temperatures that depended on the MnAs cluster size. Some intermediate paramagnetic clusters (structurally disordered clusters) were also observed. (c) 2007 American Institute of Physics.}},
author = {{Kwiatkowski, A. and Wasik, D. and Kaminska, M. and Bozek, R. and Szczytko, J. and Twardowski, A. and Borysiuk, J. and Sadowski, Janusz and Gosk, J.}},
issn = {{1931-9401}},
language = {{eng}},
number = {{11}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Applied Physics Reviews}},
title = {{Structure and magnetism of MnAs nanocrystals embedded in GaAs as a function of post-growth annealing temperature}},
url = {{http://dx.doi.org/10.1063/1.2739215}},
doi = {{10.1063/1.2739215}},
volume = {{101}},
year = {{2007}},
}