M{umlt o}ssbauer study of the magnetic character and ordering process of the cubic {gamma}-FeSi{sub 2} phase obtained by Fe implantation into a Si(100) matrix
- Instituto de Fisica, Universidade Federal Rio Grande do Sul, 90501-970 Porto Alegre, Rio Grande do Sul (Brazil)
- Instituut voor Kern-en Stralingsfysika, Catolic University, B-300L Leuven (Belgium)
- Lawrence Berkeley Laboratory, The University of California at Berkeley, Berkeley, California 94720 (United States)
The magnetic character and the ordering process of {gamma}-FeSi{sub 2} precipitates formed by Fe implantation into Si(100) followed by ion-beam epitaxial crystallization (IBIEC) have been studied using the M{umlt o}ssbauer technique. Measurements performed at 4 K have shown no evidence of magnetic interaction indicating that the {gamma}-FeSi{sub 2} phase is not of magnetic character. Conversely, conversion-electron M{umlt o}ssbauer experiments performed after the IBIEC procedure show basically the presence of a doublet, despite the cubic structure of the {gamma}-FeSi{sub 2} precipitates. However, after 1 h of annealing at 600{degree}C, a singlet, which before was barely recognizable, became more pronounced. The singlet-to-doublet proportion increases with increasing Fe concentration (2 at.{percent}{le}{ital C}{sub {ital p}}{le}8.5 at.{percent}), indicating that after annealing a better ordering in the{gamma}-FeSi{sub 2} 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. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 388307
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 54, Issue 16; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
M{umlt o}ssbauer and x-ray diffraction studies of the phase composition of crystallized Nd{sub {ital x}}Fe{sub 81.5{minus}{ital x}}B{sub 18.5} alloys with 7{le}{ital x}{le}16 (abstract)
Sn-119 M{umlt o}ssbauer study of dilute tin-lead alloys