1. Peter Grünberg Institute Forschungszentrum Jülich GmbH 52425 Jülich Germany
2. JARA‐FIT RWTH Aachen University 52056 Aachen Germany
3. Institute of Materials in Electrical Engineering and Information Technology II (IWE 2) RWTH Aachen University 52056 Aachen Germany
4. Elettra–Sincrotrone Trieste S.C.p.A. S.S. 14 km–163,5 in AREA Science Park, I‐34149 Basovizza Trieste Italy