Effects of crystalline precipitates on the soft magnetic properties of metallic glasses

Abstract

Effects of crystalline precipitates, nucleating at temperatures slightly below the crystallization temperatures, on the soft magnetic properties are reported for some selected metallic glasses. Emphasis is placed on the effects due to the difference of the crystalline symmetry of the precipitates. The glassy alloys selected for the present study are Fe85B15, Fe77B23, and Fe60Ni25B15, which tend to precipitate bcc-Fe, bct-Fe3B, and fcc Fe-Ni crystalline particles, respectively. It is concluded that the differences in structure of the precipitates are more important than their morphology in determining the ac properties of the materials at frequencies greater than 50 kHz.