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Dependence of Curie temperature on the thickness of epitaxial (Ga,Mn)As film

Sorensen, BS; Sadowski, Janusz LU ; Andresen, SE and Lindelof, PE (2002) In Physical Review B (Condensed Matter and Materials Physics) 66(23).
Abstract
We present the magnetotransport properties of very thin (5-15 nm) single (Ga,Mn)As layers grown by low-temperature molecular beam epitaxy. A lower (Ga,Mn)As thickness limit of 5 nm for the ferromagnetic phase and the dependence of the Curie temperature on (Ga,Mn)As thickness are determined from electrical-transport measurements. The Curie temperature is determined to be 97 K for the thinnest ferromagnetic sample and is found to decrease for increasing layer thickness. A carrier density of 7.1x10(20) cm(-3) for the 5 nm thick (Ga,Mn)As layer is determined from Hall measurements. Differences between magnetotransport properties of thick and thin (Ga,Mn)As layers are observed and discussed.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
66
issue
23
publisher
American Physical Society
external identifiers
  • wos:000180279400026
  • scopus:0037116189
ISSN
1098-0121
DOI
10.1103/PhysRevB.66.233313
language
English
LU publication?
yes
id
436424f0-aa59-4817-bca5-cc8667225b27 (old id 320197)
date added to LUP
2007-11-14 13:26:11
date last changed
2017-01-01 06:54:40
@article{436424f0-aa59-4817-bca5-cc8667225b27,
  abstract     = {We present the magnetotransport properties of very thin (5-15 nm) single (Ga,Mn)As layers grown by low-temperature molecular beam epitaxy. A lower (Ga,Mn)As thickness limit of 5 nm for the ferromagnetic phase and the dependence of the Curie temperature on (Ga,Mn)As thickness are determined from electrical-transport measurements. The Curie temperature is determined to be 97 K for the thinnest ferromagnetic sample and is found to decrease for increasing layer thickness. A carrier density of 7.1x10(20) cm(-3) for the 5 nm thick (Ga,Mn)As layer is determined from Hall measurements. Differences between magnetotransport properties of thick and thin (Ga,Mn)As layers are observed and discussed.},
  author       = {Sorensen, BS and Sadowski, Janusz and Andresen, SE and Lindelof, PE},
  issn         = {1098-0121},
  language     = {eng},
  number       = {23},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Dependence of Curie temperature on the thickness of epitaxial (Ga,Mn)As film},
  url          = {http://dx.doi.org/10.1103/PhysRevB.66.233313},
  volume       = {66},
  year         = {2002},
}