Eddy-current-resistant SmCo5/CaF2 magnets produced via high-energy milling in polar and non-polar liquids

► Hot-pressed SmCo5-CaF2 composites have 7 times increased electrical resistivity. ► The SmCo5-CaF2 composites may serve as low-eddy-current permanent magnets. ► Thin SmCo5 flakes can be formed via surfactant-free milling in polar liquids.