1. Unité Mixte de Physique, CNRS, Thales, University Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
2. Institute of Condensed Matter and Nanosciences, UCLouvain, Place Croix du Sud 1, 1348 Louvain-la-Neuve, Belgium
3. Centre de Nanosciences et de Nanotechnologies, CNRS, University Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
4. National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan