Glass formability and soft magnetic properties of bulk Y-Fe-B-Ti metals

The Ti effect on the glass forming ability and the magnetic properties of Y-Fe-B-Ti bulk metallic glasses have been investigated. Substituting 2 and 4 at.% Ti for Fe or B in Y6Fe72B22 alloy decreases the saturation magnetization (σs) and deteriorates the glass forming ability, respectively. However, substitution of 2 at.% Ti for Y in Y6Fe72B22 alloy induces larger supercooled region of 72.7 °C, which not only makes the bulk glassy rod as large as 3 mm in diameter, but also results in the superior soft magnetic properties of σs = 126 emu/g, coercivity (Hc) = 0.2 Oe and Curie temperature (TC) = 268 °C. Among all Y-Fe-B-Ti bulk amorphous rods, Y4Fe72B22Ti2 displays the best glass forming ability and also the proper soft-magnetic properties.