1. Unité Mixte de Physique, CNRS, Thales, Université Paris Sud, Université Paris-Saclay, F-91767 Palaiseau, France
2. MANA, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
3. Department of Energy Conservation and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
4. Departamento Electricidad y Electrónica, Universidad del Paıs Vasco-UPV/EHU, 48940 Leioa, Spain
5. Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany
6. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
7. Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan