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Mossbauer 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

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Mossbauer 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

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Título Mossbauer 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
Autor Maltez, Rogério Luis
Amaral, Livio
Behar, Moni
Vantomme, A.
Langouche, G.
Lin, X.W.
Abstract The magnetic character and the ordering process of y-FeSi₂ precipitates formed by Fe implantation into Si(100) followed by ion-beam epitaxial crystallization (IBIEC) have been studied using the Mössbauer technique. Measurements performed at 4 K have shown no evidence of magnetic interaction indicating that the y-FeSi₂ phase is not of magnetic character. Conversely, conversion-electron Mössbauer experiments performed after the IBIEC procedure show basically the presence of a doublet, despite the cubic structure of the y-FeSi₂ precipitates. However, after 1 h of annealing at 600 °C, a singlet, which before was barely recognizable, became more pronounced. The singlet-to-doublet proportion increases with increasing Fe concentration (2 at.%≤Cp≤8.5 at.%), indicating that after annealing a better ordering in the y-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.
Contido em Physical review. B, Condensed matter. New York. Vol. 54, no. 16 (Oct. 1996), p. 11659-11665
Assunto Efeito mossbauer
Fisica da materia condensada
Retroespalhamento rutherford
Tunelamento : Microscopia eletronica de transmissao
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/104169
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