A multiple-scattering (MS) EXAFS study of nanocrystalline iron prepared by high-energy ball milling is presented. The use of MS signals has allowed an accurate investigation of the local structure. The dramatic decrease of the coordination numbers, followed as a function of the milling time, is assigned to the presence of a large number of ill-coordinated atoms. The stronger reduction of the three-atom multiple-scattering signal confirms this interpretation. An ''in-situ'' annealing (up to about 1100 degrees C) is shown to increase the local coordination.
Probing local structure by multiple-scattering EXAFS data-analysis: Application to nanocrystalline iron
DI CICCO, Andrea
1995-01-01
Abstract
A multiple-scattering (MS) EXAFS study of nanocrystalline iron prepared by high-energy ball milling is presented. The use of MS signals has allowed an accurate investigation of the local structure. The dramatic decrease of the coordination numbers, followed as a function of the milling time, is assigned to the presence of a large number of ill-coordinated atoms. The stronger reduction of the three-atom multiple-scattering signal confirms this interpretation. An ''in-situ'' annealing (up to about 1100 degrees C) is shown to increase the local coordination.File in questo prodotto:
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