1. Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia, I-06123 Perugia, Italy
2. Laboratory Magnetic Metamaterials, Saratov State University, 83 Astrakhanskaya Street, Saratov 410012, Russia
3. Kotel'nikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, Moscow 125009, Russia
4. Terahertz Spintronics Laboratory, Moscow Institute of Physics and Technology (National University), 9 Institutskii lane, Dolgoprudny 141700, Russia
5. Imec, 3001 Leuven, Belgium
6. KU Leuven, Departement Materiaalkunde, 3001 Leuven, Belgium