To enable a solid magnetic material to be rationally manufactured from material having soft magnetic characteristic through a die casting process by a method wherein an alloy component of soft magnetic material and one or more additional elements which lower a melting point is used as starting material.

An alloy which contains boron, carbon, and/or phosphorus as elements which lower a melting point is used as starting material. An alloy which contains elements enough in amount of make its melting point lower than temperatures of 1,400°C is used. While a magnetic material manufactured through a die casting method is thermally treated, a hydrogen atmosphere is continuously or discontinuously scavenged. That is, the magnetic material is thermally treated at temperatures of 850 to 1,000°C in a moist hydrogen atmosphere first and then successively subjected to a thermal treatment at temperatures of 1,000 to 1,250°C in a dry hydrogen atmosphere. In this case, a magnetic material manufactured through a die casting method is thermally treated in a moist hydrogen in a temperature range of 870 to 950°C for 2 to 16 hours and successively thermally treated in a dry hydrogen atmosphere in a temperature range of 1,050 to 1,120°C for, at least, one hour and a half.