1. Fraunhofer Institute for Ceramic Technologies and Systems (IKTS), Michael-Faraday-Strasse 1, 07629 Hermsdorf, Germany
2. Fraunhofer Institute for Ceramic Technologies and Systems (IKTS), Maria-Reiche-Strasse 2, 01109 Dresden, Germany
3. Bundesanstalt für Materialforschung-und Prüfung, Unter den Eichen 87, 12205 Berlin, Germany
4. Friedrich-Schiller-University Jena, Institute of Condensed Matter Theory and Solid State Optics, Max-Wien-Platz 1, 07743 Jena, Germany
5. Institute for Solid State Electronics, Technische Universität Dresden, 01062 Dresden, Germany