Title: Mossbauer study of the magnetic character and ordering process of the cubic gamma-FeSi2 phase obtained by Fe implantation into a Si(100) matrix
Authors: Maltez, RL ×
Amaral, L
Behar, M
Vantomme, André
Langouche, Guido
Lin, XW #
Issue Date: Oct-1996
Publisher: Published for the American Physical Society by the American Institute of Physics
Series Title: Physical Review B, Condensed Matter vol:54 issue:16 pages:11659-11665
Abstract: The magnetic character and the ordering process of gamma-FeSi2 precipitates formed by Fe implantation into Si(100) followed by ion-beam epitaxial crystallization (IBIEC) have been studied using the Mossbauer technique. Measurements performed at 4 K have shown no evidence of magnetic interaction indicating that the gamma-FeSi2 phase is not of magnetic character. Conversely, conversion-electron Mossbauer experiments performed after the IBIEC procedure show basically the presence of a doublet, despite the cubic structure of the gamma-FeSi2 precipitates. However, after 1 h of annealing at 600 degrees C, a singlet, which before was barely recognizable, became more pronounced. The singlet-to-doublet proportion increases with increasing Fe concentration (2 at. %less than or equal to C-p less than or equal to 8.5 at. %), indicating that after annealing a better ordering in the gamma-FeSi2 precipitates is achieved. This ordering is obtained by an adequate combination of Fe-implanted concentration and thermal annealing. These studies have been complemented by Rutherford backscattering and/or channeling and transmission electron microscopy experiments.
ISSN: 0163-1829
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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