Recently, new amorphous alloys with wide supercooled liquid region below crystallization temperature have been found. These alloys have high glass forming ability and high thermal stability combined with high deformability in supercooled liquid region. In addition, Fe-based glassy alloys, which have ferromagnetizm at room temperature, have high electrical resistivity and good soft magnetic properties. We tried to prepare powder cores consist of Fe-based glassy alloy powder insulated with dielectric utilizing high thermal stability and high deformability of these alloys. The purpose of this work is to obtain new amorphous powder cores with good soft magnetic properties for high-frequency AC application.
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