Title: Low-temperature annealing study of Ga1-xMnxAs: magnetic properties and Hall efect in pulsed magnetic fields
Authors: Malfait, Mathieu
Vanacken, Johan
Van Roy, W
Borghs, Gustaaf
Moshchalkov, Victor #
Issue Date: Apr-2005
Publisher: Elsevier science bv
Series Title: Journal of Magnetism and Magnetic Materials vol:290-291 pages:1387-1390
Abstract: We have investigated the structural, magnetic and transport properties of a series of epitaxial Ga1-xMnxAs layers with different Mn contents from x = 0.02 to x = 0.08 grown by low-temperature M BE at a thickness of about 40 nm. After growth the samples were submitted to low-temperature resistance-monitored annealing in an oxygen atmosphere. Magetization measurements show a large enhancement of the Curie temperature and the saturation magnetization. Hall measurements were performed in pulsed magnetic fields up to 50T, from which the hole densities for all annealed samples have been obtained. We find that hole concentrations determined from the Hall slope at magnetic fields up to 12T are systematically overestimated. © 2004 Elsevier B.V. All rights reserved.
ISSN: 0304-8853
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Physics and Astronomy - miscellaneous
# (joint) last author

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