Outstanding glass formability and magneto-caloric effect of a Fe85Co3Zr5B4Nb3 metallic glass

Excellent Magnetocaloric Performance of the Fe87Ce13−xBx (x = 5, 6, 7) Metallic Glasses and Their Composite

“…Each set of point plots is linearly fitted well, and the slope (expressed by n ) of the linear fitting is 0.756 for x = 5, 0.759 for x = 6, and 0.750 for x = 7, respectively. The values of n are consistent with that of other MGs [ 16 , 17 , 18 , 23 , 24 , 25 , 26 , 29 , 30 ] but slightly larger than the predicted value of the mean field model [ 35 ]. This deviation is mainly caused by local inhomogeneity in MGs because the presence of short-range ordered clusters in MGs leads to a magnetic transformation in a wide temperature range [ 17 ].…”

“…Figure 5 a displays the −Δ S m peak under 5 T of the Fe 87 Ce 13−x B x (x = 5, 6, 7) amorphous ribbons and some Fe-Zr-B-based MGs [ 15 , 16 , 17 , 18 , 23 , 24 , 25 , 26 , 36 ]. A positive correlation between −Δ S m peak and T c was observed in the Fe-Zr-B-based MGs, implying that the higher −Δ S m peak can only be achieved at higher temperatures for the Fe-Zr-B-based MGs, which is very unfriendly for the application of magnetic refrigeration at room temperature.…”

“…Additionally, the presence of magnetic hysteresis and thermal hysteresis in these compounds prevents them from operating at high frequencies with fast response. On the contrary, the metallic glasses (MGs) that exhibit a broader −Δ S m peak (−Δ S m peak ) without magnetic hysteresis and thermal hysteresis are preferred, such as Gd-based and Fe-based MGs [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. The tunable Curie temperature ( T c ) in a wide range of composition adjustments is beneficial for constructing the flattened −Δ S m curve [ 15 , 16 , 17 ].…”

“…Compared with rare-earth (RE)-based MGs, Fe-based MGs show greater application value in civil aspects (such as magnetic refrigerators, air conditioners, wine cabinets, and so on) due to their lower cost and better glass forming ability (GFA), but the −Δ S m peak of these Fe-based MGs is not as high as that of RE-based MGs [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Therefore, improving the −Δ S m peak of the Fe-based MGs as much as possible is a top priority for the civil application of MR technology.…”

“…Therefore, improving the −Δ S m peak of the Fe-based MGs as much as possible is a top priority for the civil application of MR technology. Amongst these reported Fe-based MGs, Fe-Zr-B-based MG ribbons are the outstanding ones [ 15 , 16 , 17 , 18 , 23 , 24 , 25 , 26 ]. For example, the Fe-Zr-B ternary amorphous ribbons exhibited a −Δ S m peak under 5 T of 2.75–3.34 J/(kg × K) at the T c ranging from 271 K to 327 K [ 18 , 24 ].…”