1. Research Group ReMI; KU Leuven Technology Campus Ostend; B-8400 Ostend Belgium
2. Institute of Electrical Machines; RWTH Aachen University; Aachen D-52062 Germany
3. Department of Physics and Astronomy, Solid-State Physics and Magnetism; Ku Leuven; Leuven Belgium
4. Institut fur Theorie Elektromagnetischer Felder; TU Darmstadt; Darmstadt D-64283 Germany