The substitution effect of chromium on the magnetic properties of (Fe1−xCrx)80Si6B14 metallic glasses (0.02≤x≤0.14)

Magnetization studies were carried out to characterize the magnetic properties of the Iron-rich metallic glasses (Fe1−xCrx)80Si6B14 with 0.02≤x≤0.14. The Curie temperature TC diminishes almost linearly with the increase in the Cr-content from 401 K (x=0.10) to 291 K (x=0.14), while the saturation magnetization MS at T=5 K also undergoes a linear reduction from 169 Am2 kg−1 (x=0.02) to 87 Am2 kg−1 (x=0.14). These results suggest that the system should become paramagnetic for x≈0.22. The magneto-caloric properties of samples with TC near room temperature, i.e., with x=0.12 and 0.14, were investigated up to a maximum magnetic field change of 8 T. Both ribbons are characterized by a very broad temperature dependence of the magnetic entropy change ΔSM(T) and moderate peak values of 2.9 Jkg−1 K−1 and 2.6 Jkg−1 K−1, respectively.