The Department of Power Electronics held a two-day workshop on magnetic materials in power electronics in Krakow. 15 international guests are working in a DFG-funded initiative (“Scientific Network”, 425868835) on research into new methods for characterizing core losses in soft magnetic materials. The University of Kassel has compiled a so-called “core evaluation kit”, which is intended to contribute to the standardization and verification of measurement methods of worldwide partners. The next steps of this initiative will be presented at the IEEE Applied Power Electronics Conference (APEC 2025) in Atlanta, USA, in March 2025.