1. Peter Grünberg Institute (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
2. Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany
3. Experimentalphysik IV A, RWTH Aachen University, 52074 Aachen, Germany
4. mProbes GmbH, 52428 Jülich, Germany
5. Cryovac GmbH & Co KG, 53842 Troisdorf, Germany
6. Faculty of Mathematics and Natural Sciences, Institute of Physics II, University of Cologne, 50937 Cologne, Germany