Satellite structure description

Fig. I. Low-energy satellite structures (indicated by S) in the region of the 3d XPS spectra of La and Sm metal and of Ce in CeSb, pointing to the need of a dynamical description of the core hole screening mechanism (Wertheim and Campagna 1978).

Inclusion of vertex corrections improves the description of the absolute position of QP energies in semiconductors [23] and the homogeneous electron gas (HEG) [24], although the amount of such corrections depends very sensitively on the model used for the vertex [25]. Vertex corrections constructed using the so-called cumulant expansion [26], reproduce the multiple-plasmon satellite structure in alkali metals [27] (the GW spectral function only shows an isolated satellite). 

The classification can be extended to amoeboid, dendritic, or dotlike types, but these terms are self-descriptive and need for alphabetic designations appears unnecessary. Thus one might symbolize a belite grain as Type AE, meaning that it has normal lamellae and they extend into the matrix or Type CF, indicating a complex internal structure and satellite crystals, etc. Designations of polymorph variety in the writer s classification are not intended, but polymorph variety and abundance are of major significance. 

The change of intensity on field reversal was measured for superlattice satellites around the (002), (004) and (006) Bragg peaks. The results are siunmarized in fig. 50. The measurements were then compared with different models for the magnetic structure in the interface region, as also shown in fig. 50, The best description of the data was found to be one in which the Gd moment is fully saturated at the centre of each Gd block, with a smooth reduction in the size of the moment through the interface region as shown in the top panel. 

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