1. Center for Integrated Sensor Systems, Danube University Krems, 2700 Wiener Neustadt, Austria
2. Faculty of Mathematics, University of Vienna, Vienna, 1090 Wien, Austria
3. Institute for Solid State Physics, TU Wien, 1040 Wien, Austria
4. CD-Laboratory for Advanced Magnetic Sensing and Materials, TU Wien, 1040 Vienna, Austria
5. Toyota Motor Corporation, 1200 Mishuku, Susono, Shizuoka 410-1193, Japan
6. Technology Research Association of Magnetic Materials for High-efficiency Motors (Mag-HEM) Higashifuji-Branch, 1200 Mishuku, Susono, Shizuoka 410-1193, Japan