Pressure-induced effects on the structural properties of iron selenides produced by mechano-synthesis

Extended x-ray absorption fine structure studies were performed to follow the structural behaviour of FeSe2 and FeSe/Fe7Se8 nanocrystalline phases produced from a mechanically alloyed Fe25Se75 mixture when exposed to high pressure. A phase transition from marcasite FeSe2 to NiAs-type FeSe/Fe7Se8 was...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2004-12, Vol.16 (47), p.8485-8490
Main Authors: Campos, C E M, de Lima, J C, Grandi, T A, Machado, K D, Itié, J P, Polian, A
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Materials synthesis
materials processing
Physics
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Summary:Extended x-ray absorption fine structure studies were performed to follow the structural behaviour of FeSe2 and FeSe/Fe7Se8 nanocrystalline phases produced from a mechanically alloyed Fe25Se75 mixture when exposed to high pressure. A phase transition from marcasite FeSe2 to NiAs-type FeSe/Fe7Se8 was previously reported when the milling time was increased from 20 to 62 h; this study proposes to verify the possibility of inducing the same phase transition in high-pressure experiments using a diamond anvil cell.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/16/47/003