1. Institute of Experimental Physics, TU
Bergakademie Freiberg, Leipziger Str. 23, 09599 Freiberg, Germany
2. Institute of Materials Science, TU Bergakademie
Freiberg, Gustav-Zeuner-Str. 5, 09599 Freiberg, Germany
3. Institute of Applied Physics, TU Bergakademie
Freiberg, Leipziger Str. 23, 09599 Freiberg, Germany