Permeability Macromodels for Magnetic Powder Materials Under DC Bias Arne Schröder, Tommaso Bradde, Dierk Bormann, Alexandru Savca, Stefano Grivet-talocia (2025) Permeability Macromodels for Magnetic Powder Materials Under DC Bias, In: IEEE TRANSACTIONS ON POWER ELECTRONICS, pp. 15265-15277, ISSN: 0885-8993