Open AccessMagnetic EXAFS calculations for disordered alloys
Author(s) -
Popescu V.,
Ebert H.,
Jenkins A. C.
Publication year - 1999
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049598017130
Subject(s) - extended x ray absorption fine structure , materials science , condensed matter physics , physics , optics , absorption spectroscopy
A fully relativistic scheme is presented that allows one to describe the magnetic Extended X-ray Absorption Fine Structure (MEXAFS) in disordered systems. This method is based on a combination of the relativistic multiple scattering theory and the Coherent Potential Approximation (CPA) alloy theory. The alloy systems Fe=Coz-= and FexPtl-= are used to illustrate the ability of this theoretical approach due to the availability of suitable experimental data. For the latter system a rather pronounced impact of the degree of order on the MEXAFS has been found.