Effect of boron on the magneto-caloric effect in Fe91−x Zr9B x (x = 3, 4, 5) amorphous alloys

In the present work, Fe91−x Zr9B x (x = 3, 4, 5) amorphous alloys were employed to study the effect of boron on the magnetic properties of Fe-based amorphous alloys. Thermal and magnetic properties of Fe91−x Zr9B x (x = 3, 4, 5) amorphous alloys were measured. Although the amorphous alloys show similar glass forming ability, peak values of magnetic entropy change (−ΔS m peak ) and Curie temperature (T c) near room temperature improve significantly with increasing boron content. The improved T c, as well as −ΔS m peak , is due to the enhanced direct interaction between Fe atoms, which is ascertained by the increasing µ eff with boron addition in the Fe91−x Zr9B x (x = 3, 4, 5) amorphous alloys.