Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 8, Pages 1251-1253Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1555260
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We demonstrate the formation of ferromagnetic Ga1-xMnxAs films by Mn ion implantation into GaAs followed by pulsed-laser melting. Irradiation with a single excimer laser pulse results in the epitaxial regrowth of the implanted layer with Mn substitutional fraction up to 80% and effective Curie temperature up to 29 K for samples with a maximum Mn concentration of xapproximate to0.03. A remanent magnetization persisting above 85 K has been observed for samples with xapproximate to0.10, in which 40% of the Mn resides on substitutional lattice sites. We find that the ferromagnetism in Ga1-xMnxAs is rather robust to the presence of structural defects. (C) 2003 American Institute of Physics.
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