1. CD-Laboratory for Advanced Magnetic Sensing and Materials, Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria
2. Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria
3. Infineon Technologies Austria AG, Siemensstrasse 2, 9500 Villach, Austria