1. Max‐Planck‐Institut für Eisenforschung GmbH Max‐Planck‐Straße 1 40237 Düsseldorf Germany
2. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA
3. Institute of Physics IA RWTH Aachen University 52056 Aachen Germany
4. PGI 10 (Green IT) Forschungszentrum Jülich GmbH 52428 Jülich Germany
5. Department of Materials Royal School of Mines Imperial College Prince Consort Road London SW7 2BP UK