1. JARA‐FIT and 2nd Institute of Physics RWTH Aachen University 52074 Aachen Germany
2. Peter Grünberg Institute (PGI‐9) Forschungszentrum Jülich 52425 Jülich Germany
3. Research Center for Functional Materials National Institute for Materials Science 1‐1 Namiki Tsukuba 305‐0044 Japan
4. International Center for Materials Nanoarchitectonics National Institute for Materials Science 1‐1 Namiki Tsukuba 305‐0044 Japan