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Type: Artigo de evento
Title: Thermal Scanning Studies Of Percolated Fe-cu Granular Alloys
Author: Socolovsky L.M.
Sanchez F.H.
Abstract: Fe-Cu alloys produced by mechanical alloying were studied with Mössbauer thermal scanning spectroscopy (MTS). This technique consists in recording Mössbauer effect absorption at a fixed energy while the temperature of the sample is changed. Hyperfine magnetic field behavior can be closely followed. Four mechanically alloyed samples FexCu 100-x with iron concentration x=30, 35, 40, and 45 at.% were studied. Absorption graphs (intensity vs. temperature) are similar for all samples: intensity sharply falls with the increase of the temperature, following the collapse of the sextet lines. This collapse occurs at a very precise temperature, which coincides with a magnetic-nonmagnetic transition line in a former magnetic phase diagram. Conventional Mössbauer spectroscopy confirms the appointed phase change, displaying a doublet at temperatures above the critical. © 2003 Elsevier Inc. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/S1044-5803(03)00078-0
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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