Magnetic and Magneto-Caloric Properties of the Amorphous Fe92−xZr8Bx Ribbons

Abstract

Magnetic and magnetocaloric properties of the amorphous Fe92−xZr8Bx ribbons were studied in this work. Fully amorphous Fe89Zr8B3, Fe88Zr8B4, and Fe87Zr8B5 ribbons were fabricated. The Curie temperature (Tc), saturation magnetization (Ms), and the maximum entropy change with the variation of a magnetic field (−ΔSmpeak) of the glassy ribbons were significantly improved by the boron addition. The mechanism for the enhanced Tc and −ΔSmpeak by boron addition was studied.

The Effect of Fe Addition on the Curie Temperature and Magnetic Entropy of the Gd45Co50Al5 Amorphous Alloy

“…Another important indicator of measuring the comprehension MCE of the alloy is the refrigeration capacity (RC = −∆ S m peak × δ T FWHM ), and the RC of the Gd 45 Co 50−x Fe x Al 5 (x = 2, 5, 10) AM is calculated as 723 J/kg when x = 2, ~740 J/kg when x = 5 and ~770 J/kg when x = 10 under the field of 5 T, respectively. Compared with other results in the literature [ 18 , 19 , 20 , 21 , 22 , 23 , 26 , 27 , 28 , 29 , 30 , 31 ], the relatively large RC of the Gd 45 Co 50−x Fe x Al 5 (x = 2, 5, 10) AM are comparable to that of the Gd-Co binary AM (~720 J/kg), and are obviously better than that of the Fe-Zr-B-based AM (~600 J/kg). They are even superior than those of Gd 50 Co 50−x Fe x (x = 2, 5) (~700 J/kg) and Co 50 Gd 50−x (Fe/Ni) x (x = 1, 2, 3) (~680 J/kg) AM with the same Curie temperature.…”

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

“…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 ].…”

Formability and Magnetic Properties of the Binary Nd-Co Amorphous Alloys

“…TM-based MGs, typically the iron-based MGs, are much cheaper than the RE-based MGs due to the greater reserves of TM. However, unfortunately, the iron-based MGs show lower maximum −∆S m (−∆S m peak ) and thus cannot match the requirement of high efficiency for a magnetic refrigerator [12,[14][15][16]].…”