Large glassy alloy discs (12 mm diameter, 1mm thickness) of high relative density (~98) were prepared by spark plasma sintering. The bulk magnetic cores (12 mm outer diameter, 6 mm inner diameter, 1 mm thickness) exhibit good soft magnetic properties: saturation magnetization is 1.44T, coercivity is 31 A/m, and effective permeability at 1 kHz is 1320. They also exhibit much lower loss than a silicon steel core; core loss at 10kHz and maximum induction of 0.2T is only 81.7 W/kg.
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