Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) study of melt-spun Fe85Ga15 ribbons

The local structure in melt-spun Fe85Ga15 ribbons with a width 3 mm and thickness 60 mum produced in argon atmosphere was studied by analyzing EXAFS and XANES data. The following results were obtained: Ga-Ga bonds were not detected excluding the tendency to form clusters of Ga atoms; Ga substitutes...

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Published inJournal of magnetism and magnetic materials Vol. 320; no. 20; pp. e578 - e582
Main Authors Sato Turtelli, R., Pascarelli, S., Ruffoni, M., Grössinger, R., Eisenmenger-Sittner, C.
Format Journal Article
LanguageEnglish
Published 01.10.2008
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Summary:The local structure in melt-spun Fe85Ga15 ribbons with a width 3 mm and thickness 60 mum produced in argon atmosphere was studied by analyzing EXAFS and XANES data. The following results were obtained: Ga-Ga bonds were not detected excluding the tendency to form clusters of Ga atoms; Ga substitutes Fe creating a local strain of about +1% on the first shell Fe-Ga bond, whereas on the second Fe-Ga shell strain quickly relaxes down to +0.3%; XANES spectra are compatible with a random substitution of Fe atoms by Ga atoms in the A2 structure. From the AFM investigation, we observed that at the surface (free side) of the ribbon the particles are elongated along the ribbon (2 mumX5 mum) and each particle is formed by small grains of average size of 200 nm.
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ISSN:0304-8853
DOI:10.1016/j.jmmm.2008.04.036