Title: Nanometer-scale magnetic MnAs particles in GaAs grown by molecular beam epitaxy
Authors: DeBoeck, J
Oesterholt, R
VanEsch, A
Bender, H
Bruynseraede, C
Van Hoof, Chris
Borghs, Gustaaf #
Issue Date: May-1996
Publisher: Amer inst physics
Series Title: Applied Physics Letters vol:68 issue:19 pages:2744-2746
Abstract: Spherical MnAs ferromagnetic particles with controllable diameters (5-30 nm) are embedded in a high quality GaAs matrix. The particles are formed in a two step process consisting of the epitaxy of a homogeneous Ga1-xMnxAs layer at low temperatures using molecular beam epitaxy followed by phase separation upon annealing. During the annealing step, the excess arsenic in the as-grown film forms magnetic MnAs precipitates with the Mn from the Ga1-xMnxAs lattice. Structural and room-temperature magnetic properties of the heterogeneous GaAs:MnAs films are described. The magnetic MnAs rich layers can be incorporated into semiconductor heterostructures as demonstrated by growing (GaAs/AlAs) multiple quantum well structures in combination with GaAs:MnAs layers. (C) 1996 American Institute of Physics.
ISSN: 0003-6951
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
ESAT - MICAS, Microelectronics and Sensors
# (joint) last author

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