Abstract
A selective survey is given on polarization and direction effects in X-ray spectra which can be observed by working with single-crystal samples and taking advantage of linearly polarized radiation. The first section deals with the polarization effects in the X-ray absorption spectra (XAS) arising from linear X-ray dichroism and from the angular dependence of the 1s→3d quadrupole transition. Recently obtained results on NiO, FeO, FeCO3, Bi2Sr2CaCu2O8 and α-Fe2O3 are reported. In the second part the polarized X-ray emission spectra (XES) are considered. Recently obtained results at YBa2Cu3O7−δ are presented and linear magnetic dichroism (LMXD) in XES has been found. Finally, the polarization dependence of resonantly excited X-ray emission spectra (RXES) is considered. First results of a complete polarization analysis of resonantly excited Cu Lα-XES of La2CuO4 are reported.
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