1. Center for Integrated Sensor Systems, Danube University Krems, 2700 Wiener Neustadt, Austria
2. Faculty of Mathematics, Vienna University, 1090 Vienna, Austria
3. CNRS, Institut Néel, 25 rue des Martyrs, 38042 Grenoble, France
4. Department of Physics, University of California, Davis, California 95616, USA
5. Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany
6. College of Engineering, University of Exeter, Exeter EX4 4QF, United Kingdom
7. Department of Physics, University of York, York YO10 5DD, United Kingdom
8. Toyota Motor Corporation, 1200 Mishuku, Susono, Shizuoka 410-1193, Japan
9. Technology Research Association of Magnetic Materials for High-efficiency Motors (Mag-HEM) Higashifuji-Branch, 1200 Mishuku, Susono, Shizuoka 410-1193, Japan