1. Peter Gruenberg Institute 9 (PGI 9) and JARA-FIT, Forschungszentrum
Juelich GmbH, 52425 Juelich, Germany
2. Zentralinstitut für Engineering,
Elektronik und Analytik (ZEA-3), Forschungszentrum Juelich GmbH, 52425 Juelich, Germany
3. Univ. Grenoble Alpes, 38000 Grenoble, France and CEA, LETI, Minatec Campus, 38054 Grenoble, France
4. Institute of Microwaves and Photonics,
School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom