Ultra-Low Core Loss and High-Frequency Permeability Stability in Hot-Press Sintered FeSi Soft Magnetic Composites by Fe 2 O 3 Nanoparticles Air Gap Filling. - Arif, Muhammad; Han, Donghun; Shin, Wonchan; Cha, Seunghun; Pak, Changsun; Kim, Youngkwang; Kim, Sangwoo; Lee, Bowha; Rhyee, Jongsoo (Materials (1996-1944), 2025)