1. Peter Grünberg Institute (PGI 9) and JARA‐Fundamentals of Future Information Technologies Forschungszentrum Jülich GmbH 52428 Jülich Germany
2. Faculty of Mathematics, Computer Science and Natural Sciences RWTH Aachen University 52074 Aachen Germany
3. Faculty of Electrical Engineering and Information Technology RWTH Aachen University 52074 Aachen Germany
4. Peter Grünberg Institute (PGI 10) and JARA‐Fundamentals of Future Information Technologies Forschungszentrum Jülich GmbH 52428 Jülich Germany