1. Institute of Energy and Climate Research − Materials Synthesis and Processing (IEK-1), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
2. Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, 52066 Aachen, Germany
3. Helmholtz Institute Münster (HI MS, IEK-12), Forschungszentrum Jülich GmbH, 48149 Münster, Germany