1. Institute for Material Research, Hasselt University, 3590, Diepenbeek, Belgium
2. IMOMEC, IMEC vzw, 3590, Diepenbeek, Belgium
3. Dpto. Ciencia de los Materiales, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
4. Univ. Grenoble Alpes, CNRS, Institut Néel, 38000 Grenoble, France