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EXAFS Analysis on Ultrafine Powder of an Amorphous Ni 70 B 30 Alloy
Author(s) -
Wang WenCai,
Chen Yu
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199702)199:2<335::aid-pssb335>3.0.co;2-5
Subject(s) - extended x ray absorption fine structure , amorphous solid , ribbon , materials science , amorphous metal , radial distribution function , alloy , absorption (acoustics) , pair distribution function , atom (system on chip) , distribution function , phase (matter) , crystallography , analytical chemistry (journal) , chemical physics , molecular physics , metallurgy , chemistry , absorption spectroscopy , composite material , thermodynamics , optics , computational chemistry , physics , molecular dynamics , organic chemistry , quantum mechanics , computer science , embedded system
The radial distribution function of ultrafine powder of an amorphous Ni 70 B 30 alloy has been studied by extended X‐ray absorption fine structure (EXAFS). The particles with diameters of about 1.9 to 15.8 nm are prepared by chemical reduction. The EXAFS function at low momentum transfer is obtained, using the cumulant expansion of EXAFS amplitude and phase functions. The structural parameters of near neighbors around Ni are obtained through processing the asymmetrical radial distribution function. The distribution of near neighbors around a Ni atom differs from that in an amorphous ribbon. The radii of near neighbor sub‐shells surrounding a Ni atom are shorter than those in the amorphous Ni 66 B 33 ribbon.