1. Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria
2. Institute of Semiconductor and Solid State Physics, Johannes Kepler University, Altenbergerstrasse 69, 4040 Linz, Austria
3. Business Unit Coating, PLANSEE SE, Metallwerk-Plansee-Strasse 71, 6600 Reutte, Austria