-At this point, I would like to express special thanks to Dr. Eva Rauls.
-The extended version of this thesis would not have been possible without as well as her expertice in
+At this point, I would like to express special thanks to Dr.\ Eva Rauls.
+The present thesis would not have been possible without her assistance and mentoring with respect to the utilized methods required by the new approach of investigation as well as her expertise in the materials system.
+I am greatly thankful for the possibility to repeatedly visit the theory group in Paderborn.
+In this context, Dr.\ Simone Sanna is acknowledged for respective technical support and Michael Weinl, doctoral student of Prof. J\"org K. N. Lindner back then, for accommodation.