ABSTRACT

In this section we briefly review the real-space Green’s function (RSGF) multiple-

scattering (MS) approach for calculations of X-ray absorption spectra (XAS) and

X-ray magnetic circular dichroism (XMCD), as developed by Ankudinov and

Rehr (AR) [Ankudinov and Rehr (1997)]. As discussed by Schattschneider in this

volume in Chap. 3, the energy loss magnetic chiral dichoism (EMCD) spectra are

virtually identical to XMCD within the dipole-approximation, so the approach

discussed here is also applicable to EMCD. An alternative approach to XMCD

based on the wave function approach, as implemented in the linearized aug-

mented planewave method (LAPW), is discussed by Ambrosch-Draxl and Manghi

in Chap. 5 Also, the treatment of EELS and EMCD from atomic multiplet theory is

discussed by Calmels and Rusz in Chap. 4.