Abstract
In this work, Fe80-xMxP13C7 (M = Co, Ni; x = 0, 5 and 10 at.%) bulk metallic glasses (BMGs) were prepared, and the effect of the Co/Ni elements substitution for Fe on the magnetocaloric properties of Fe80P13C7 BMG has been investigated systematically. The Curie temperature (TC) of the present Fe-based BMGs increases with the substitution of Fe by Co/Ni. The magnetic entropy change (ΔSM) of the present Fe-based BMGs increases first and then decreases with the increase of Fe substituted by Co, but monotonically decreases with the increase of Fe substituted by Ni. Among the present Fe-based BMGs, the Fe75Co5P13C7 BMG exhibits the maximum ΔSM value of 5.21 J kg−1 K−1 at an applied field of 5 T, which is the largest value among Fe-based amorphous alloys without any rare earth elements reported so far. The present Fe-based BMGs exhibit the large glass forming ability, tunable TC and enhanced ΔSM value, which are beneficial for magnetic refrigerant materials.
Highlights
Mn-Fe-P-Ps [8], etc., show a giant magnetic entropy change (∆SM ) based on the first order magnetic phase transition (FOMT), and some shortcomings including the low corrosion resistance, high hysteresis losses and expensive raw materials, which greatly limit the application of these materials in the field of magnetic refrigeration [9,10]
Compared with the FOMT magnetocaloric materials, metallic glasses, e.g., Fe-based amorphous alloys, exhibit magnetocaloric effects based on the second order magnetic phase transition (SOMT) and possess the unique advantages of magnetic refrigeration materials, such as superior mechanical properties, low hysteresis and thermal hysteresis, higher electrical resistivity, and so on [11,12]
These results indicate that systematic investigation of the effect of transition metals on magnetocaloric effect should be significant
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Fe-based amorphous alloys show a low value of ∆SM frequently, which greatly restricts their application as magnetic refrigeration materials [13]. It is of significance and importance for. Many studies have indicated that the element addition to Fe-based amorphous alloys may cause significant changes in their magnetocaloric properties. The partial substitution of Fe by Co and Ni in Fe-Zr-B-Cu amorphous alloy leads to the increase of TC , and appropriate doping Co and Ni elements enhances the value of ∆SM for Fe71.5 Co8.25 Ni8.25 Zr7 B4 Cu1 amorphous alloy [17] These results indicate that systematic investigation of the effect of transition metals on magnetocaloric effect should be significant. Previous studies showed that Fe80 P13 C7 bulk metallic glass (BMG) exhibited excellent magnetocaloric performance with the ∆SM of 5.05 J kg−1 K−1 under an applied field of
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